From: Clemens Ladisch <clemens@ladisch.de>
To: alsa-devel@alsa-project.org
Subject: Re: ASoC: mmap or read/write?
Date: Fri, 19 Oct 2012 10:58:14 +0200 [thread overview]
Message-ID: <50811626.9030100@ladisch.de> (raw)
In-Reply-To: <5080F434.6040602@topic.nl>
Mike Looijmans wrote:
> From: Prasant J <pj0585@gmail.com>
>>> Prasant J wrote:
>>>> I'm writing an alsa application for recording & playing 16 channel audio.
>>
>> I'm working with Beaglebone (ARM Cortex-A8 720 MHz). (Currently
>> failures are for 8 channels 32 bit / 16 bit, but our final target is
>> 16 channels)
>>
>> I have managed to get Audio capture working fine (after certain linux
>> optimizations) but playback is giving under-runs (only when PLAYBACK &
>> CAPTURE run together)
>
> You must be doing something wrong. I'm doing 32-bit, 16-channel input
> at 51.2kHz on a OMAP-L138 (an ARM9 CPU at 450 MHz)
Playback and capture at the same time seems to be harder for certain
embedded devices. I don't know if this is a driver bug or a hardware
limitation.
Regards,
Clemens
next prev parent reply other threads:[~2012-10-19 8:59 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.1.1350554402.30975.alsa-devel@alsa-project.org>
2012-10-19 6:33 ` ASoC: mmap or read/write? Mike Looijmans
2012-10-19 8:58 ` Clemens Ladisch [this message]
2012-10-19 9:36 ` Prasant J
2012-10-19 9:56 ` Mike Looijmans
2012-10-18 8:38 Prasant J
2012-10-18 9:09 ` Clemens Ladisch
2012-10-18 9:37 ` Prasant J
2012-10-18 14:32 ` Clemens Ladisch
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