Hello Erik,

That is the case with normal files but ISO test stream has one file (l3-he_mode.mpg) which starts with mono then switches to dual and then joint stereo. (For testing only I believe)

Regards, Tony

-----Original Message----- From: mad-dev-admin@lists.mars.org [mailto:mad-dev-admin@lists.mars.org] On Behalf Of Erik Jälevik Sent: Thursday, March 25, 2004 6:51 PM To: mad-dev@lists.mars.org Subject: [mad-dev] No of channels constant?

Sorry if this is slightly off topic but I don't know of any other place where people might know the answer.

Is the number of channels an MP3 file is encoded in always constant? Or can it change from stereo to mono somewhere in the middle?

Or to phrase it differently: Can I always assume that pcm->channels has the same value within the output callback as long as I'm working on the same file?

Thanks, Erik