On 10-03-08 16:17, Rene Herman wrote: > On 10-03-08 08:34, Michael Cree wrote: > >> Bob Tracy wrote: > >>> Supposedly with the ES1888, dma1 is for capture, dma2 is for >>> playback. dma2 == 5 is a 16-bit channel, yes? That could explain >>> much... > > It is, but what would it explain? You're only having playback problems, > right? > >>> >>> As for the values "chosen" for dma1 and dma2, they are the ones that >>> keep showing up in the Alpha sound "howto" postings/documents. >> >> Running 'show config' in SRM on my Alphas (PWS500au and XP1000) reveals >> the settings (except possibly for mpu_port) for the ESS1888 sound chip. >> I recall that they are as reported in Alpha sound howtos. > > Can it be forced to use dma2=0 (an 8-bit channel, and the usual capture > channel on es18xx)? However, that might not be the issue anyway: > >> I hadn't been using the ESS1888 for awhile, but have just tried it out >> since you reported problems. I am running kernel 2.6.24.3 and Debian >> testing on the XP1000. I tried playing a number of wav files with >> alsa's aplay, sox's play and with mocp. I found that aplay and mocp >> worked reliably through the ESS1888. Sox's play on some files did play >> back a small extra segment of the file - particularly on short files and >> usually some section near the end of the file - once it had completed >> playing the file once; maybe this is what you are also observing. > > This sounds very suspiciously like a difference with playing through the > native ALSA interface and the OSS emulaion. Could you and/or Bob confirm > that sox is using the OSS emulation and not ALSA natively? Bob is spam-blocking me (sigh...) so perhaps you can make sure he sees this. > I could very well imagine the ALSA OSS emulation being broken on Alpha. > I doubt any of teh developers has an Alpha. And if aplay works correctly > this seems very likely. > > "sox" _can_ use ALSA natively as well by the way (see manpage for the > version you have installed). > >> More onerously, my testing eventually ended in a complete system lock up! >> I ran play (or was it aplay - sorry can't remember now) > > Vital if play is using the OSS interface... > >> and the system locked up. Got a response with ping across the network but >> couldn't log in via ssh. Have been playing mplayer through the ESS1888 >> for the last couple of days (don't like it though - the sound quality of >> the ESS1888 is not good enough for my ears) and haven't had another one >> of those lockups since. > > Mmm. Rene _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
