From owner-freebsd-arm@freebsd.org  Wed Mar 22 16:36:35 2017
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Subject: Re: Pi-series sound output options
To: Karl Denninger <karl@denninger.net>,
 "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org>
References: <025036c0-a5a7-33f2-58a7-55f31fbc6e41@denninger.net>
From: Hans Petter Selasky <hps@selasky.org>
Message-ID: <ddee7a47-65ad-a414-d760-0688dad9090d@selasky.org>
Date: Wed, 22 Mar 2017 17:35:33 +0100
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On 03/22/17 17:19, Karl Denninger wrote:
> This application NEEDS sound output capability.  I don't care if it's on
> a plug-in via USB but it has to work in a "FreeBSD-like" manner (e.g.
> open up a PCM channel, etc.)

Hi,

Do you need both playback and recording?

How many channels, bitrate etc?

USB audio 2x16-bit 48k over FULL or preferably HIGH-speed should work 
reliably.

Your hang issue sounds like a GPIO / unhandled IRQ issue.

--HPS