I don't notice any accentuation in volume, timbre or velocity of the Ab below middle C in the Petrof Mistral Warm preset.
However, this phenomenon does sometimes happen: in addition to the possibility that a particular resonant frequency of a room or speakers or headphones or something else in your audio chain or environment is accentuating a particular note, some velocity-sensitive MIDI keyboards have "hot keys" that transmit MIDI velocity values that are higher than those of other keys when pressed with the same force. The MIDI keyboard I use, a Kawai MP11SE, has a function to adjust the volume of each key independently in order to regulate and compensate for the imperfect or irregular velocity-sensitivity. Pianoteq Pro (in Note Edit) also allows one to adjust the volume (and hammer hardness, in the case of timbre) of every note individually to compensate for velocity or volume irregularities.
Last edited by Stephen_Doonan (09-11-2021 15:49)
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Linux, Pianoteq Pro, Organteq