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Date:      Mon, 27 Sep 2010 17:55:44 +0300
From:      Alexander Motin <mav@FreeBSD.org>
To:        "S.N.Grigoriev" <serguey-grigoriev@yandex.ru>,  FreeBSD Stable <freebsd-stable@freebsd.org>
Subject:   Re: snd_hda: how to duplicate output
Message-ID:  <4CA0B070.8080906@FreeBSD.org>
In-Reply-To: <mailpost.1285586678.4925103.59926.mailing.freebsd.stable@FreeBSD.cs.nctu.edu.tw>
References:  <mailpost.1285586678.4925103.59926.mailing.freebsd.stable@FreeBSD.cs.nctu.edu.tw>

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S.N.Grigoriev wrote:
> this is an exerpt from 8.1R detailed Release Notes:
> 
> 2.2.2.1 Multimedia Support
> [snipped]
> The snd_hda(4) driver now supports multichannel (4.0 and 7.1)
> playback support. The 5.1 mode support is disabled now due to 
> unidentified synchronization problem. Devices which supports 
> the 7.1 mode can handle the 5.1 operation via software upmix 
> done by sound(4). Note that stereo stream is no longer duplicated 
> to all ports.
> 
> I'm interesting in what way can I restore the old behaviour, when
> stereo stream is duplicated to the black and grey sound card
> output connectors?

The only way is to change channel mapping (chmap array) for stereo
streams in hdac_stream_setup() function.

-- 
Alexander Motin



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