Topic: Mic placement algorithm and harpsichord

I have watched an interesting interview of Rick Wakeman , famous prog rock keyboardist  ( YES group) with classical background made on Rick Beato ‘s YouTube channel and he talked about how he learned to mic harpsichord in Studio. He worked with Thomas Goff who was a famous British maker of harpsichord in the 60’s . Goff’s harpsichord were considered at the time as the ‘steinways’ of harpsichord . Thomas Goff told  Rick Wakeman and the Studio engineers who initially recorded sessions with harpsichords mic’ed in a similar way than acoustic pianos , that they did it wrong and that Harpsichords should be mic’ ed beneath the instrument . Apparently , it was much better .


So , here is my question :  Current presets of harpsichords are mic’ ed from above , so according to Goff’ are incorrectly mic’ed so it would be great if we could change the setting in an effective way  but this assuming it is possible .I am
correct in assuming that mic position in Pianoteq modelling is agnostic of the geometry of the instrument is only depending of distance/angle of the mic from the piano?


If the answer I yes , it would be great to effectively refine the model if at possible to take more parameters into consideration so that mic positioning is more in line with reality . Mic positioning and mic characteristics changes fundamentally the way the sound is presented to the audience/player is paramount . In sampled pianos the changes in sound are the result of mixing real samples made with specific microphones and the possibilities for the user is select which set of microphones was used and change the mix of the samples like a studio engineer doing the mix , and it works well because all characteristics of the instrument and ambience were captured in the samples . In the modelling approach , you have obviously the latitude of positioning the mic like you want , but the current weakness( at least my own impression of it) is that the mic behaviour and placement doesn’t fully represent the reality .

Last edited by Pianistically (12-11-2024 14:47)

Re: Mic placement algorithm and harpsichord

Pianistically, people pianists appear permitted to put placements of microphones about pianos and harpsichords everywhere inside PIANOTEQ, perfectly, pleasingly, passionately, and very realistically (puns and iteration intended).

Philippe Guillaume wrote:

Actually, "mic placement" would be more appropriate for describing the action of clicking on the small mic icon right to the output pull-down menu. The menu itself contains the four output modes that are available: mono, stereo, sound recording (the one we recommend for recording), and binaural.

See: "Sound recording" feature (but no way to record sound?).  That was Sep. 9, 2009.

Really I do appreciate information from your first paragraph!

However after version 4 was initially released from MODARTT, it was subsequently specified that it permitted mic placements even underneath soundboards!

Today as far as any sound goes or might emit from the soundboards, perhaps geopolitically it's just no more (politically) correct to one person's standard probably than it's long been viewed incorrect by bureaucrats, many others in the world of free artistic expressiveness.

Historically, harpists and pianists (both) have held differing points of views on the harps and pianos altogether, and, whatever to them seems best, er somehow correct arguably whenever idealistic performers alike rather can immediately record the percussion instruments satisfactorily to everyone's unique likings, for each to enjoy  — although along with various audiences appearing also interested and equally eager to hear them.

Last edited by Amen Ptah Ra (13-11-2024 12:27)
Pianoteq 8 Studio Bundle, Pearl malletSTATION EM1, Roland (DRUM SOUND MODULE TD-30, HandSonic 10, AX-1), Akai EWI USB, Yamaha DIGITAL PIANO P-95, M-Audio STUDIOPHILE BX5, Focusrite Saffire PRO 24 DSP.

Re: Mic placement algorithm and harpsichord

Amen Ptah Ra wrote:

Pianistically, people pianists appear permitted to put placements of microphones about pianos and harpsichords everywhere inside PIANOTEQ, perfectly, very pleasingly, and very realistically (puns and iteration intended).

Philippe Guillaume wrote:

Actually, "mic placement" would be more appropriate for describing the action of clicking on the small mic icon right to the output pull-down menu. The menu itself contains the four output modes that are available: mono, stereo, sound recording (the one we recommend for recording), and binaural.

See: "Sound recording" feature (but no way to record sound?).  That was Sep. 9 2009.

Really I do appreciate information from your first paragraph!

However after version 4 was initially released from MODARTT, it was subsequently specified that it permitted mic placements even underneath soundboards!

Today as far as any sound goes, perhaps geopolitically it's just no more (politically) correct to one person (stationed somewhere) probably than it's long been incorrect to others (elsewhere) in the world of free artistically expressive musicians.

Historically, harpists and pianists (both) have held differing points of views on the harps and pianos together, or, whatever to them seems best, er somehow correct arguably whenever idealistic performers alike rather can immediately record the instruments to their individual likings, for themselves  —along with various audiences appearing interested and eager to hear them.

   Hello,  the point/question I am making is that being able to position microphones underneath the soundboard , doesn't mean that the specificity of the geometry of the  instrument is taken into consideration . The fact of the matter is that you can even position the microphone in places that are impossible to reach in reality.   Given  you can even  position the mics inside the wooden part of the bottom of the instrument  which doesn't correspond to any physical context , makes me think that the model doesn't take the specific keyboard/frame part into consideration but only represents the capture of the initial wave sound  by a microphone positioned at a given place from the source,  whatever the position is.

Now regarding your point about diversity of opinions , I would generally agree with you, however the  "one person (stationed somewhere)"  happen to be  Thomas Goff and Rick Wakeman and are not to be considered as  your average obscure piano makers and usual  unknown YouTuber aspirant musician, for Thomas was a legendary Harpsichord maker and Rick Wakeman, in case you don't know him, is one of the best progressive rock keyboardist of our time , still alive, with very long experience in studio , with an incredible numbers of albums and live performances in the most prestigious scenes, so their opinion should be respected and listened to , imho.

Last edited by Pianistically (13-11-2024 10:03)

Re: Mic placement algorithm and harpsichord

Having recorded a lot of early keyboards (pianofortes and harpsichords), the only thing I can say is that there are NO rules, only the result counts. Sometimes I placed the microphones behind the pianist, sometimes at the other end of the instrument, closer or further away (depending on the acoustics of the room). In fact, that's what took me the longest at the beginning of the sessions. After that, all I had to do was press “record” and “stop”! Having said that, and even though I like Rick Wakeman a lot (and a very nice guy at that), I don't know any music lover who listens to a harpsichord (or a piano) lying on the floor...

Re: Mic placement algorithm and harpsichord

Luc Henrion wrote:

Having recorded a lot of early keyboards (pianofortes and harpsichords), the only thing I can say is that there are NO rules, only the result counts. Sometimes I placed the microphones behind the pianist, sometimes at the other end of the instrument, closer or further away (depending on the acoustics of the room). In fact, that's what took me the longest at the beginning of the sessions. After that, all I had to do was press “record” and “stop”! Having said that, and even though I like Rick Wakeman a lot (and a very nice guy at that), I don't know any music lover who listens to a harpsichord (or a piano) lying on the floor...

true, however clavichords and harpsichords were intimate instruments and were not designed to be used in large rooms  or halls like a modern piano and the aim of the microphone is to capture the best possible sound coming from the instrument not necessarily in relation to the physical audience. For instance  ,I would say that no piano listener in a room listen to the piano under the lid either which is however a classic mic placement for pianos.

I actually cannot comment about the difference of sound itself when you record a clavichord  above or beneath , but the point raised in the video triggered my question about how the model really works in term of placement .

Re: Mic placement algorithm and harpsichord

Pianistically, I just did a re-edit.  If you will, check it out a bit.

Anyway, your point now I see though you seem uncertain about it.  Perhaps a staff member would like to chime in here and clarify a thing or two about the mics.  I myself have often wondered how you can make virtual models of physical microphones coming with their own spec sheets showing around a 22000 Hz maximum reachable high frequency to now somehow reach frequency levels approaching 192000 Hz digitally via new software modeling, and if truly the software mics are themselves as advertised in that they remain continually virtual exact copies of the physical models along with all respective manufactures' specifications and/or limitations in PIANOTEQ.

Pianistically wrote:

Thomas Goff and Rick Wakeman and are not to be considered as  your average obscure piano makers and usual  unknown YouTuber aspirant musician, for Thomas was a legendary Harpsichord maker and Rick Wakeman, in case you don't know him, is one of the best progressive rock keyboardist of our time , still alive, with very long experience in studio , with an incredible numbers of albums and live performances in the most prestigious scenes, so their opinion should be respected and listened to , imho.

Have to just remain positive!  I will as long as I can...  But, apparently ivory poachers are still seeking out either animal herds or human bodies to acquiesce and therefore certainly just give into all their demands.

Last edited by Amen Ptah Ra (13-11-2024 14:24)
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Re: Mic placement algorithm and harpsichord

Thanks Pianistically! - I loved and enjoyed the interview - certainly Rick Wakeman is someone who's opinions are golden.

Re. 'under' - he really didn't mean to put mics 'only under', just to be clear - the vid is marked to begin where he talks about the 12 mics, for readers' convenience.

https://youtu.be/zppfjeculUs?si=h-OwQgJ...amp;t=2357

Here are some idea goose-chasing about this kind of thing - in hopes it gives some helpful perspective to anyone thinking about this kind of thing. Hope to make the notion of many mics make sense.. although these days, I'm not so sure anyone might really 'need' or crave for it *but that's just my observations to current times.. and I'm just one among many who may have differing ideas - and I guess also - I think, it's just normal for humans to on the one hand think "things work best this way", and yet simultaneously believe "there are no rules" - that's true.. it's OK to know things can be like they were, like they are - and they'll be like they'll become too.. and it's all OK.

My main exposure to the idea of having more mics can cover a lot of territory.. from dealing with sharp attacks making 'near mics' seem too close (compared to much of the typical piano recording techniques I'd suggest someone like Rick Wakeman will have experienced). In my case, beginning at the end of the 1970s in a studio, we didn't have a 'de-esser' for every track until like the early 80s. So, I can imagine at the time of Rick's experience with the harpsichord recording technique, neither might many studios with even custom mixing consoles. We had 2 units on a rack, one better than the other iirc.. and if we needed to use the de-esser for more than just a vocal plus backing vocals or troublesome drum room captures, we might have to do sort of time-consuming things like mix a troubled instrument track out to a 2nd tape machine with de-esser engaged - and then run that signal back to a different main tape track. (easier than it sounds - but with each 'trick' like that, you lose time - but also possibly a little quality). That's a minor thing maybe.. but treble 'transients' were horribly handled by a lot of studio compressors at that time. You needed 'body' in the signal to 'work' them. So harpsichord's needle-like attack would cruise through the slow old compressors.. and of course, the 'body' hitting would risk crushing the signal.. balancing act.. when there were new faster compressors coming on at the time, many didn't have the ability to work in ways taken for granted these days (like parallel compression for the most obvious one perhaps). Instead of being able to mix 3 different compressors, we may be quite stuck with a small selection of very good ones at the time - but nothing like what's possible since maybe the 80s.. (think of things like one compressor or de-esser of sorts for top end transients, one for body, one for makeup/shaping - and maybe even more on the mastering end of things too). It's easy to frankenstien all that stuff too much - and it definitely can be overkill.

That's not all - many mics sharing 'the spatial ambience' means, various things.. despite maybe some inclination to believe it might end up a 'weak' or 'phase' problem in the making.. at some point, once you have enough mixed in signals from vastly differing perspectives, it will 'glue'. It's possible that it springs forth really, from 'wall of sound' days (there have been many well known and not so well known people making discoveries and theories about this stuff, beyond just ideas about stereo itself.). Should add, multi mic ideas predate any hardware encoded 'surround' systems.. so mono and stereo particularly would have been the only final goal..

Other issues (esp. relating to the timeline of that story of the 12 mics), is that maybe it wasn't typical for the London studios (who may have been the only ones who 'knew' of that particular method mentioned btw).. the hardware may not have typically had great 'de-essers' onboard which may have helped with the high treble transients in the attacks.. plus the body of the sound decays much faster than a piano..

In short, to make a 'big full recording' of one of these period instruments, indeed, it helps to have more of a portion of ambient space collected within the room - and in those times, (and maybe until now also), using that 12 mic technique could be interesting to learn more about - but I'd definitely suggest, like Rick Wakeman mentions also, it's often just "let the audio people perform their role - after you performed your part". With very famous people, like Bowie, and producers like Tony Visconti etc. as the characters in the stories.. it really helps to convey these things to people who'd like to learn more about recording (by learning some of the 'how it was done before digital times' etc.).

My concern about 12 mics in Pianoteq would amount to a concern over CPU (the radiating model kind of does good things to replace the need for so many mics - imho) - but who knows, one day it may be possible to have more mics in an improved model. Even now though, to be absolutely fair.. many like 2 mics for piano (and most other acoustic instruments).. some like 3 or more.. but for sure, 5 can be tricky as it is, overkill quite often. More than 5 and the actually fairly few users who venture into the mics seriously, may end up with a ever decreasing satisfaction from every new mic they switch on.

I'm mostly using default presets now - when I like to keep editing 'for a project', it's pretty much that.. for one a time use. A bit like real life.. and for many users, it's often most satisfying to just find a mic setting for a fav piano/preset and set it, forget it and make music. For others.. I think a deep microphone labyrinth could be fun - but honestly, I don't think many are missing out on something by not having 12 mics. Like I hope to convey above, I really think it was a combination of 'the era' (equipment) and a very clever person to get a nice template for a way to repeat doing at in different studios.. but like so many things about recording.. one person may say "Oh, it has to be this way, or it's just not correct".. but hey, there will likely be many equally successful folks who've done it differently for as long or just currently, but really well too

Grain of salt and all. But - I've enjoyed this interview - and quite of few of Rick Beato's interviews - it's really, I believe, highly valuable for new/young recordists to hear from those old horses' mouths about.. 'how' we got to how things are now. Some perspective, maybe some deference to the reality of what grounds these people already covered (decades ago) might stop a lot of disagreements in this day and age too. Like Luc says there are no rules. I like that - and often say "No rules, just infinite rules!"


BTW - should mention - different people and genres will have absolutely a lot of different sort of 'safety rails' for what works in their world. I have absolute respect for classical recordists, like Luc might say he hits start/stop (kind of understating the solid hand he has on the wheel I'm sure) .. and has some rules to mic things.. but you don't get to be good at setting up, unless you're doing it a lot - and hats off.

In Rick Wakeman's time, he's seen classical and contemporary music through a long timeline. One thing I'd like to add about 'mics' - and esp. in regards to piano.. is that like he mentions, he was learning as he went, from people who had been recording others like himself for a long time. Rick said, he noticed things like the way pianos often were recorded with close mics (isolating from ensemble at times, using a cover as a kind of movable baffle and so on).. essentially though, esp. in pop and some modern music, indeed, close mic is common - and it's what is done with FX later which is to create ambience which replaces 'the room' to an extent. Often, it is to run dispirate sources (like abstract vocals/samples whatever) through 'the same' virutal space or reverb(s). This is indeed infinite in scope.

Consider the way vocals may be recorded in a booth (commonly), or at home studios with pop shield or small baffle-like shielded cages (foam padded tiny booths essentially).. the idea being, to "NOT" capture 'the room'.. so as the voice is easier to operate upon within the production/mix goals. Adding reverb or ambience to a clean signal can be better (in a lot of contemporary cases) than having some room or 'boom' from the room or tails or reflections which may be 'ugly' compared to nicely tailored BPM staged delays etc. (from extremely subtle through to 'you are supposed to hear this weird bit' - depending on genre or artists with whatever trademark things they aim for and so on).

I nearly forgot why I added the 'BTW' above.. I guess the main element I wanted to shine a light upon, is that, in contrast to close mic work, having a more ambient mic technique for esp. 'era' instruments gives a natural sense of the thing being in a space. I think people often may not notice when the music they are listening to, goes from 'realistic' like a band with a piano in the middle of the stage, to some pop music with the piano zipping around the edges with little motiffs and only occasionally taking up the whole sound stage more realistically.. a lot of modern audio production for a long time, has been about sort of painting with sound. If a mic is placed somewhere strange, in pop.. it may not follow that a listener will hear/understand where the mic was placed.. they're hearing the final mixed-in result which might collude with other instrument parts to 'glue' the piano in a novel way.

With close mics, you tend to bring things out by taming elements and enhancing or magnifying others in a way (in various ways, which may include saturation/echos/reverbs/chambers/plate for the basics).. but with more distant mics, you might expand on that sound and not go cutting or sculpting so much.. by kind of 'pulling the instrument' out of the room and in some ways then settling the stereo image with additional buff and polish (whether again nudging things with compression/EQ and maybe additional ambience) all interesting stuff.. I'm sure the next time I put on some classical music I'll be listening to how they might have mic'd the piano. I kind of tend to overlook that.. esp. with classical music since it's almost inevitable that it's within the bounds of expectations - but with other music? Try thinking of "how did they mic things for that piano sound" next time you hear a piano or harpsi!


Here's probably my fav contemporary-ish harpsichord in a kind of pop song. Stranglers 'Golden Brown'.. it's a repeating riff etc.. but check how you have quite a sense of the harpsichord in the piece.. you can kind of hear how the mix seems to place all instruments in the same space.. kind of traditional in a lot of ways - but vocals and guitar are probably the most 'modern' exceptions to that (mixing-wise).

To me, it would not matter if the harpsichord was recorded with 2 or 12 mics - if it works well


https://www.youtube.com/watch?v=z-GUjA67mdc

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Re: Mic placement algorithm and harpsichord

I've encountered placing microphones under a harpsichord or pianoforte as a recommendation/best practice from multiple sources over the years--so it's not just limited to this interview or technician.  That said, what I feel is missing from PTQ for both pianos and harpsichords is a toggle option (or gradient) that operates like the lid parameter, which itself operates more as an EQ parameter.  While the flexibility of placing microphones in impossible positions and still getting a perfectly clear tone is amazing, there are times where I'd like to place a mic behind or under a piano or other instrument for the specific effect I'd get from doing that to an acoustic instrument.  (For example, sometimes the darker muddied sound recorded from below and to the left of a grand piano makes for a better room mic sound in some mixes than a traditional room mic placed high and to the right--especially if you can't place one at proper distance for some reason.  I'm amazed how often I see an extra off-axis microphone down-and-to-the-left in orchestral mixing situations, read live piano concerto recordings, as it allows a pleasant bleed of orchestra and piano sound while still having some room mic texture/function without picking up as many audience coughs.)  Having the option for such changes to the sound be toggled on or off--allowing the option to keep the crystal clear mic pickup when needed or "colored" by the exterior of the instrument when not needed--would be a very welcome addition.

It's my understanding that the recommendation for harpsichords specifically is to combat the fact that most modern piano recordings place microphones to "see" the hammers, which gives a characteristically bright sound, rather than having more of the piano's resonance in the mix (e.g. when placing microphones in the tail--they're not the primaries, they're just there for color with primaries either being on axis with the hammers or in a stereo configuration that looks at all or most of the harp, including the hammers).  This effect in a harpsichord adds more attack to the plucking action if the microphone can "see" the plectrum make contact with the strings, which generally isn't desirable as harpsichord already have a rather harsh attack without amplifying it.  By placing the microphones under the harpsichord, the sound board's natural impedance (along with the case's impedance) helps to even the balance between attack and the decay/resonance of the instrument, which yields a more even (and likely desirable) sound.  Also, the problem of placing microphones under a piano, where pedaling becomes very loud in a mix (potentially ruining it), is much less of an issue, as harpsichord pedals are generally limited to adding or removing string registers--much like changing the stops on an organ--which occurs infrequently if at all during most performances.

P.S. I'll give your response, Qexl, more time and attention (that it well deserves!) later today, but I did want to say, that with precise MIDI clocking (either using a central clock or using Standalone for fixed render timing), you can render and re-render the same recording using infinitely microphone configurations and either mix or directly over-dub them.  I've had situations where I could only do PTQ mock-ups with a simple stereo pair and then rendered multiple additional microphone configurations after the fact to keep the CPU from taking over everything going on.  (Here's look at you Dorico and NotePerformer with Iconica Sketch for full orchestra alongside PTQ...)

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Re: Mic placement algorithm and harpsichord

@Qexl & Tmyoung .  Chaps,  thanks for the long detailed posts . I am tied up tonight and will read carefully your comments tomorrow . Very interesting conversation and perspectives.

Re: Mic placement algorithm and harpsichord

Thanks to you too Pianistically!

Great stuff @tm - I only used under-cab mics occasionally - it's interesting to know harpsichord mic arrays might have more commonly used that perspective That needle sharp treble transient of harpsichords is such a thing.

tmyoung wrote:

after the fact

Absolutely - the digital era makes the old studio chores seem as truly dreadful as some of them really were heh... the things we can do now in digital toolsets.. like post production in real time (without hurting our knees) is amazing It's been quite a ride and honestly, few things warm my heart more than people learning from some good sources with a wealth of experience like Rick Wakeman personifies.

It's wild, that in this time, a person can become their own Wakeman-like persona, play/record their music to similar standards as may have even recently been possible only in a fine (expensive) studio. If I were young and kicking off in this era?? I'd be leaning in to videos like this one Pianistically kindly posted by Rick Beato and trying to learn everything I could about "how they did things".. because it will echo for some time to come - and its relevance is useful, not a distraction but part of a quite rich history. These days, in our own homes, we can kind of replicate multi-million dollar studios, for an absolute fraction. So it's nice to see people like Rick Wakeman appearing on video conversations like this.. if not able to give full examples of mic rigs or whatever, it's inspiring to others to begin to think about this kind of thing. Anyway - such a cool thing to see

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Re: Mic placement algorithm and harpsichord

Very interesting comments indeed .  Here a few notes …

@QEXL

1. About the London Studios… Indeed the studios in the 60-80's period were unique and were for sure pivotal in discovering and experimenting recording effects and times for sure were different. One has to remember that when the Beatles recorded the mythical 'Sgt. Pepper's Lonely Hearts Club Band' in the EMI and Abbey Road studios , they were given unlimited time and budget which today seems just impossible with the current music industry. Many effects as we know them were invented during these sessions such as plugging electric instruments in the console, reverb tricks…

2. About the famous Stranglers hit. This is a masterpiece imho, not only musically, but also because of the choice of the instruments, the way it is recorded .  You said :
"you can kind of hear how the mix seems to place all instruments in the same space.. kind of traditional in a lot of ways - but vocals and guitar are probably the most 'modern' exceptions to that (mixing-wise)." I think you cannot be so right here in your observation .  At the same the final mix is made so that the space/reverb is so subtle that it can mix well with the various scenes/locations of the video  which was itself an important contributor to the song success. But at the same times , there is a harpsichord/bass difference with the lyrics parts and this is one the magic to this record also accentuated by the unusual time signatures used specifically for the harpsi part ( 13/8 )

@TMYOUNG   You wrote

"It's my understanding that the recommendation for harpsichords specifically is to combat the fact that most modern piano recordings place microphones to "see" the hammers, which gives a characteristically bright sound, rather than having more of the piano's resonance in the mix (e.g. when placing microphones in the tail--they're not the primaries, they're just there for color with primaries either being on axis with the hammers or in a stereo configuration that looks at all or most of the harp, including the hammers).  This effect in a harpsichord adds more attack to the plucking action if the microphone can "see" the plectrum make contact with the strings, which generally isn't desirable as harpsichord already have a rather harsh attack without amplifying it.  By placing the microphones under the harpsichord, the sound board's natural impedance (along with the case's impedance) helps to even the balance between attack and the decay/resonance of the instrument, which yields a more even (and likely desirable) sound."

Thank you for this great explanation, it makes perfect sense !