Hi all,
2007/2/8, Frank Barknecht fbar@footils.org:
Yes, it's new. You could use the [list-len] abstraction from [list]-abs instead, but you need to check out an older version, because the newest one just wraps [list length].
zexy's [length] also does the job, as far as I know.
As I can see, I am still very bad at using the dB unit for audio amplitude... Anyone has a rule of thumb for this ? Should I use dB with a simple ADSR filter, let say ? I know that if you use them, -6 dB is somewhat half as loud and +6 dB is twice as loud. Great. Now, in pd, 100 is unity while in the industry, the consoles use 0 for unity level. 0 in pd is minus infinity, as far as I know. Now, what is usable ? After a drop of a few dB, we don't hear anything. Perceptualy, I find the standard [*~] range of numbers more linear than using the dB scale.
So, the RMS kind of mean the actual amplitude of the vibrating membrane of the speaker... http://en.wikipedia.org/wiki/Audio_power : hence we use [- 100] [dbtorms] for the conversion. Anything else one should know ?
Perhaps I should put it somewhere on puredata.org after. :)
Alexandre Quessy http://alexandre.quessy.net