Parallel decoding - artifacts

Hi,
I have a huge problem using lame to play several MP3 files at once. I have
implemented a player with independent reading thread and I can use up to 5
these players in my application. Everything is OK when only one player is
playing but when I launch the second one, artifacts start to appear in the
output signal.

I managed to reduce the amount of artifacts using mutex thread
synchronization so only one player is allowed to call hip_decode1_headers
method at one moment. Despite of this synchronization this method can
return some wrong samples to its PCM bufers. Using a sine test signal it
seems like the decoder sometimes skips some samples.

I read dev thread "Thread safe lame" (
https://sourceforge.net/mailarchive/message.php?msg_id=8800413) and was
wondered about the second rule: "Do not use the decoder". I hope it is
possible to use lame engine to read MP3 files paralelly.

Thank you for any advice.
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