diff options
| author | Calvin Owens <jcalvinowens@gmail.com> | 2013-04-12 22:33:59 -0500 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2013-05-13 15:02:17 +0100 |
| commit | 40de8047654debace75db0f04aebbbaace5bdd26 (patch) | |
| tree | 41fc40f3d4395812bfca5aca490ecc5e1228a991 /net/mac80211/ht.c | |
| parent | 1b136c71e8858b068b7813fed270eb4668a217ca (diff) | |
ALSA: usb: Add quirk for 192KHz recording on E-Mu devices
commit 1539d4f82ad534431cc67935e8e442ccf107d17d upstream.
When recording at 176.2KHz or 192Khz, the device adds a 32-bit length
header to the capture packets, which obviously needs to be ignored for
recording to work properly.
Userspace expected: L0 L1 L2 R0 R1 R2
...but actually got: R2 L0 L1 L2 R0 R1
Also, the last byte of the length header being interpreted as L0 of
the first sample caused spikes every 0.5ms, resulting in a loud 16KHz
tone (about the highest 'B' on a piano) being present throughout
captures.
Tested at all sample rates on an E-Mu 0404USB, and tested for
regressions on a generic USB headset.
Signed-off-by: Calvin Owens <jcalvinowens@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
[bwh: Backported to 3.2: adjust filenames, context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'net/mac80211/ht.c')
0 files changed, 0 insertions, 0 deletions