[N900] How to play more than one sample at the same time?
 

Hello folks

What is the best approach to play more than one sample at the same time on the N900? I'm open to Python, plain C/C++ or QT.

Using pyGame I can play a sound file, but it seems to allow just one at a time.

I can write a code in C that mixes many files into a buffer and then sends that to the appropriate (however it may be) sound device. But I'm wondering if there is already something done or more appropriate.

The ideal solution would be a simple API call that started the playing in background, returning immediately to the calling program.

Any hints?

Re: [N900] How to play more than one sample at the same time?
 

pygmae channel.play . upto 500 channels on N900. have a look at maesynth in extras dev, which is fully polyphonic, though has some slight timing issues.

Re: [N900] How to play more than one sample at the same time?
 

Thanks. I've found out that there is this small delay, too. How do you do to pre-cache the file so that it plays on time?

Re: [N900] How to play more than one sample at the same time?
 

You need to set the buffer size on the mixer a bit smaller. The bigger it is the bigger the delay. also helps to have you wav file at 48000 sample rate.

Where you want two samples playing at exactly the same time, I'am having to premix two sounds using sndarrays before I play them. Works pretty good, and surprisingly fast using python Numeric. Numpy would be great but is currently broken on the N900 on pygame.