SynthMaker

24-bit samples

Archive · 2010 5 old posts

From the original SynthMaker forum (2004–2014), with its members’ names and dates.

mwvdlee ·

Well, it seems like it's a bug alright, although it's a bit different from what I originally reported:

24 bit samples loaded mono in arrays are roughly 32k times too soft.

Check this bug-reproduction schematic:

Seems to work fine for 16 bit samples, only 24-bit seems to mess up, and only when mono. Could somebody please try to reproduce this by using the previously attached sample (or other 24-bit samples) and the attached schematic?

MichaelBenjamin ·

you are right, i used some 24 bit sample and player nr2 gives out amplitudes around -006. is that just with the stock player, which uses the double precision modules or with another player too, because never used the double counter, instead a normal one and i cant remember such a problem.

Tzarls ·

I had forgoten about this one. Some thing I observed are that if you load a mono sample in the three players, the output is the same for every player. If you load a stereo sample, then the last player (the one that converts stereo to mono when loading the file) gives a different reading. So I guess that what is happening is that, when you import a stereo file in a mono wave array, SM combines both channels into one mono channel, but before doing it it scales the original signal to avoid clipping. That might be the reason for the difference in levels.

Tzarls ·

Another thing - If you load a stereo sample as mono (mono with bool set to true) then the level is dropped considerably. But if you load the sample as stereo and then set the bool to true, the file isconverted to mono but the level is ok.

A bug indeed.

mwvdlee ·

Tzarls wrote: Another thing - If you load a stereo sample as mono (mono with bool set to true) then the level is dropped considerably. But if you load the sample as stereo and then set the bool to true, the file isconverted to mono but the level is ok.

A bug indeed.

If you guys see the exact same thing too, I guess I'll post it as a bug... [FIXED] 24-bit stereo samples into mono wave array

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