[PD] isosonic curves : level the perceptual loudness of different pitches

[Alexandre Quessy]

Hello all,
This abstraction is very nice, but computing matrices on every note is
quite expensive on the CPU, no? Perhaps it would be better to store it
in a table, let say using 60 (pd)db as a reference. The only thing is
that low and high notes are multiplied by factor much bigger than 1
and it makes the sound clip much. Maybe I should just use a [clip]
with the values read from the table. Any suggestion for something
usable on every day patching ?

Thanks,

a

2007/2/12, Denis Trapeznikoff <denissimo at gmail.com>:
>
>
> 2007/2/9, Ed Kelly <morph_2016 at yahoo.co.uk>:
> > So, if you have a signal at 96dBPD (-4dBFS) and you set it to 90dBPD
> (-10dbFS), the loudness will be heard to drop by the same amount as when you
> then set it to 84dBPD (-16dBFS).
> ... but remember, that ear's frequency response curve is dependent on the
> level of sound... So the amount is not "the same".
>
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-- 
Alexandre Quessy
http://alexandre.quessy.net