15 Dec
2002
15 Dec
'02
5:44 p.m.
hi everyone:
i'm running on a PIII with kernel 2.4.18 and Alsa 0.9.0rc6 and a Hammerfall 9636 card.
Alsa has been working fine for the last year, or so it seems. recently a scsi CD burner
was installed. i have some recordings of live performances made with "arecord",
version
0.9.0beta8a. they play back just fine, but when i tried to burn them to CD, they were
low
by about 2 to 3 half steps.
Joerg Shilling suggested that Alsa was writing the wrong headers. so i upgraded to rc6
and on the first try on each of the old WAV files, "aplay" also played them too
slowly.
however, on subsequent runs, everything was fine again. i don't understand this
behaviour
at all.
someone on LAU suggested that since it was too low by about 2-3 half steps, data was
being
recorded at 48000 but Alsa thought it was at 44100.
info in /proc/asound/hammerfall/rme9652:
------------snip-------------
.
.
Latency: 4096 samples (2 periods of 16384 bytes)
Hardware pointer (frames): 0
Passthru: no
Clock mode: autosync
Pref. sync source: ADAT1
IEC958 input: Coaxial
IEC958 output: Coaxial only
IEC958 quality: Consumer
IEC958 emphasis: off
IEC958 Dolby: off
IEC958 sample rate: error flag set
ADAT Sample rate: 44100Hz
.
.
---------snip-----------------
for months up until about an hour ago the ADAT sample rate read 48000. in that hour i
changed my .asoundrc from
-----------snip---------------
pcm.hammerfall { #"hammerfall" is the alias for "snd-rme9652" in
/etc/modules.conf
type hw
card0
}
ctl.hammerfall {
type hw
card0
}
-----------snip---------------
to the following
-----------snip---------------
pcm.rme9652 { #changed from "hammerfall" to "rme9652" on 12.15.2002
type hw
card 0
}
ctl.rme9652 { #same as above comment
type hw
card 0
}
---------snip-----------------
after the .asoundrc change i recorded a fresh WAV and burned it to CD but with the same
problem -- too slow. also, with the new .asoundrc, version rc6 plays WAV's recorded
with
the old .asoundrc and version rc6 a little too fast. i'm at a loss for new ideas to
debug
this.
can anyone enlighten me about this, or does anyone know where i can download some
reference WAV files (for example, a middle C tone) to check whether the burning problem
might involve Alsa or whether it's something else in my setup?
any pointers would be greatly appreciated.
tia,
patrick