On Tue, 2009-12-15 at 00:13 +0100, Roman Haefeli wrote:
Hi all
I'm trying to build an application that supports loading as many different WAV-formats as possible (primarily different bit-depths and number of channels). I found, that when focussing on PCM-encoded files only, the variety of formats is still big. Actually, i'd like the application to auto-recognize the number of channels of loaded files. Since [readanysf~] doesn't do that, i use also [ext13/wavinfo] to gather some data about the files. Unfortunately, this externals doesn't read files with a so-called 'broadcast' format. But this is a different story. Then i encountered, that there is something called 'interleaved' format. Those multi-channel files are read fine by [readsf~], but not by [readanysf~]. I have a 8-channel-interleaved file, which [readanysf~] seems to play (according to the right most outlet), but all output channels are mute. However, 8-channel-files i created myself, seem to work well with both, [readsf~] and [readanysf~]. I have another 6-channel interleaved files, which only 5 are played from by [readanysf~]. Now, i wonder what is the magic behind those 'interleaved' files and also, if there is a way to play them in Pd _AND_ have a 'seek' option as [readanysf~] offers?
Googling some more makes me believe, that 'interleaved' does mean nothing more than just 'many audio channels interleaved into one single file'. So actually both my 8-channel WAV-files are interleaved. Both are 8ch 16bit 44100Hz PCM files and still they are different in that only one of them is read correctly by [readanysf~].
- How can i get info about PCM-WAV files in Pd?
- How can i reliably play them back (with the ability to seek)?
Can you put the files online somewhere so I can download them and test them?
-august.