1 /proc/sound, /dev/sndstat
2 -------------------------
4 /proc/sound and /dev/sndstat is not supported by the
5 driver. To find out whether the driver succeeded loading,
6 check the kernel log (dmesg).
9 ALaw/uLaw sample formats
10 ------------------------
12 This driver does not support the ALaw/uLaw sample formats.
13 ALaw is the default mode when opening a sound device
14 using OSS/Free. The reason for the lack of support is
15 that the hardware does not support these formats, and adding
16 conversion routines to the kernel would lead to very ugly
17 code in the presence of the mmap interface to the driver.
18 And since xquake uses mmap, mmap is considered important :-)
19 and no sane application uses ALaw/uLaw these days anyway.
20 In short, playing a Sun .au file as follows:
22 cat my_file.au > /dev/dsp
24 does not work. Instead, you may use the play script from
25 Chris Bagwell's sox-12.14 package (available from the URL
26 below) to play many different audio file formats.
27 The script automatically determines the audio format
28 and does do audio conversions if necessary.
29 http://home.sprynet.com/sprynet/cbagwell/projects.html
32 Blocking vs. nonblocking IO
33 ---------------------------
35 Unlike OSS/Free this driver honours the O_NONBLOCK file flag
36 not only during open, but also during read and write.
37 This is an effort to make the sound driver interface more
38 regular. Timidity has problems with this; a patch
39 is available from http://www.ife.ee.ethz.ch/~sailer/linux/pciaudio.html.
40 (Timidity patched will also run on OSS/Free).
46 The driver supports a simple MIDI UART interface, with
53 This soundcard does not have any hardware MIDI synthesizer;
54 MIDI synthesis has to be done in software. To allow this
55 the driver/soundcard supports two PCM (/dev/dsp) interfaces.
56 The second one goes to the mixer "synth" setting and supports
57 only a limited set of sampling rates (44100, 22050, 11025, 5512).
58 By setting lineout to 1 on the driver command line
59 (eg. insmod es1370 lineout=1) it is even possible on some
60 cards to convert the LINEIN jack into a second LINEOUT jack, thus
61 making it possible to output four independent audio channels!
63 There is a freely available software package that allows
64 MIDI file playback on this soundcard called Timidity.
65 See http://www.cgs.fi/~tt/timidity/.
70 t.sailer@alumni.ethz.ch