[alsa-devel] [PATCH 2/2 v2] ASoC: arizona: Improve ultrasonic frequency response

Mark Brown broonie at kernel.org
Tue Feb 4 01:17:27 CET 2014

On Fri, Jan 31, 2014 at 04:16:18PM +0000, Charles Keepax wrote:
> Evaluation of the device has given some settings to improve the
> ultrasonic frequency response. However, this may cause sub-optimal
> performance in system designs with high output gains on the headphone
> path (0dB or -2dB), and as the frequencies are inaudible anyway some
> users may not desire higher frequency response at those frequencies.
> So allow the user the option to select it if it is appopriate for
> their system design.

Reading what you're saying here I can't help but think that this sounds
like it may be use case dependent as well and therefore something that
ought to be runtime controllable depending on if ultrasonics and/or line
level outputs are in use (0dB isn't high gain, it's no gain!) for
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