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? 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
