Re: bin/38493: no good audio with cdplay

[Matthias Drochner <M.Drochner%fz-juelich.de@localhost>]

The following reply was made to PR bin/38493; it has been noted by GNATS.

From: Matthias Drochner <M.Drochner%fz-juelich.de@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: gnats-admin%NetBSD.org@localhost, netbsd-bugs%NetBSD.org@localhost,
        reed%reedmedia.net@localhost
Subject: Re: bin/38493: no good audio with cdplay 
Date: Mon, 14 Jul 2008 18:24:41 +0200

 reed%reedmedia.net@localhost said:
 > It does start with a little popping/missing audio, but 
 >  appears to get better/sound better over about 15 seconds.
 
 Hmm - there could be some interaction with the audio
 buffer and its low/high water marks. The writing should adapt
 to the audio speed instead of using a fixed blocksize and
 timer interval. I don't have a good idea how to do that
 without changing the code structure.
 Does it help to use larger blocks, eg "digital 10"
 or "digital 20"? (At about 30 a limitation of the
 VM system is hit - raw SCSI commands cannot exceed
 MAXPHYS=64k bytes.)
 Does it have a positive effect for you to remove
 the sched_yield() call in sig_timer(). I don't think
 that makes much sense.
 
 > Can you commit this?
 Yes, but be should do some finetuning before.
 
 best regards
 Matthias
 
 
 
 
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