From: Felix Homann <linuxaudio@showlabor.de>
To: Clemens Ladisch <clemens@ladisch.de>
Cc: tiwai@suse.de, alsa-devel@alsa-project.org
Subject: Re: Need expert's advice - Fast Track Ultra (8R) dropping samples
Date: Wed, 06 Oct 2010 18:31:45 +0200 [thread overview]
Message-ID: <4CACA471.2000504@showlabor.de> (raw)
In-Reply-To: <4CAC89EA.8080207@ladisch.de>
Thanks Clemens for your quick response!
Am 06.10.2010 16:38, schrieb Clemens Ladisch:
>>
>> Playback:
>> Status: Running
>> Interface = 1
>> Altset = 1
>> URBs = 3 [ 57 57 57 ]
>> Packet Size = 312
>> Momentary freq = 48000 Hz (0x6.0000)
>> Interface 1
>> Altset 1
>> Format: S24_3LE
>> Channels: 8
>> Endpoint: 1 OUT (ADAPTIVE)
>> Rates: 44100, 48000, 88200, 96000
>> Data packet interval: 125 us
>>
>> Does it tell us anything?
>>
> That this device does not use frequency feedback.
>
> What happens when you are recording something and then try to play
> something else with a different sample rate? (use arecord/aplay with
> "-D hw:X")
>
>
When I start recording at 44.1 kHz while playing a wav at 48 kHz the
playback gets very distorted, sounds like lots of missing samples. I get
this from stream0:
M-Audio Fast Track Ultra 8R at usb-0000:00:1a.7-4, high speed : USB Audio
Playback:
Status: Running
Interface = 1
Altset = 1
URBs = 2 [ 5 6 ]
Packet Size = 312
Momentary freq = 48000 Hz (0x6.0000)
Interface 1
Altset 1
Format: S24_3LE
Channels: 8
Endpoint: 1 OUT (ADAPTIVE)
Rates: 44100, 48000, 88200, 96000
Data packet interval: 125 us
Capture:
Status: Running
Interface = 2
Altset = 1
URBs = 8 [ 8 8 8 8 8 8 8 8 ]
Packet Size = 312
Momentary freq = 44100 Hz (0x5.8333)
Interface 2
Altset 1
Format: S24_3LE
Channels: 8
Endpoint: 1 IN (ASYNC)
Rates: 44100, 48000, 88200, 96000
Data packet interval: 125 us
The sound stays corrupted until I record at 48 kHz again. Then
everything sounds as before, i.e. with thos noticable clicks we're
trying to sort out.
Do you need more infos?
Regards,
Felix
next prev parent reply other threads:[~2010-10-06 16:31 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-25 9:57 Need expert's advice - Fast Track Ultra (8R) dropping samples Felix Homann
2010-10-01 11:00 ` Felix Homann
2010-10-01 16:29 ` Clemens Ladisch
2010-10-03 11:50 ` Felix Homann
2010-10-03 12:00 ` Daniel Mack
2010-10-05 7:21 ` Clemens Ladisch
2010-10-06 13:57 ` Felix Homann
2010-10-06 14:38 ` Clemens Ladisch
2010-10-06 16:31 ` Felix Homann [this message]
2010-10-07 6:37 ` Clemens Ladisch
2010-10-07 8:10 ` Daniel Mack
2010-10-07 8:50 ` Felix Homann
2010-10-07 11:35 ` Felix Homann
2010-10-08 6:26 ` Clemens Ladisch
2010-10-12 7:18 ` Daniel Mack
2010-10-12 8:18 ` Felix Homann
2010-10-12 10:26 ` Daniel Mack
2010-10-13 7:47 ` Felix Homann
2010-10-13 12:48 ` Daniel Mack
2010-10-15 7:23 ` Clemens Ladisch
2010-10-15 8:59 ` Daniel Mack
2010-10-15 11:08 ` Felix Homann
2010-10-15 14:21 ` Clemens Ladisch
2010-10-03 10:02 ` Daniel Mack
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