diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /Documentation/sound/oss/es1371 |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'Documentation/sound/oss/es1371')
-rw-r--r-- | Documentation/sound/oss/es1371 | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/Documentation/sound/oss/es1371 b/Documentation/sound/oss/es1371 new file mode 100644 index 000000000000..c3151266771c --- /dev/null +++ b/Documentation/sound/oss/es1371 | |||
@@ -0,0 +1,64 @@ | |||
1 | /proc/sound, /dev/sndstat | ||
2 | ------------------------- | ||
3 | |||
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). | ||
7 | |||
8 | |||
9 | ALaw/uLaw sample formats | ||
10 | ------------------------ | ||
11 | |||
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: | ||
21 | |||
22 | cat my_file.au > /dev/dsp | ||
23 | |||
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 | ||
30 | |||
31 | |||
32 | Blocking vs. nonblocking IO | ||
33 | --------------------------- | ||
34 | |||
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). | ||
41 | |||
42 | |||
43 | MIDI UART | ||
44 | --------- | ||
45 | |||
46 | The driver supports a simple MIDI UART interface, with | ||
47 | no ioctl's supported. | ||
48 | |||
49 | |||
50 | MIDI synthesizer | ||
51 | ---------------- | ||
52 | |||
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 | |||
57 | There is a freely available software package that allows | ||
58 | MIDI file playback on this soundcard called Timidity. | ||
59 | See http://www.cgs.fi/~tt/timidity/. | ||
60 | |||
61 | |||
62 | |||
63 | Thomas Sailer | ||
64 | t.sailer@alumni.ethz.ch | ||