From: Thaddeus Woskowiak <tswoskowiak@gmail.com>
To: 9front <9front@9front.org>
Subject: Re: [9front] bcm-audio
Date: Thu, 2 Dec 2021 21:55:16 -0500 [thread overview]
Message-ID: <CAG3JMtaxqPFpiFpfZ42WhU9TkiYuFQTXcp7HbzbtaXARpBYf+w@mail.gmail.com> (raw)
In-Reply-To: <f236ae68-80ef-ead3-8344-ef87a1d8586@SDF.ORG>
> Yeah, pwm audio is not the best, and the earliest boards had just rc
> filters with some diodes to protect the output. The latest have
> a buffer (and something else) chip which improve the output.
This brings up a queston, how is PWM dac output any worse than a class
D amp which is what a PWM switching amp of which are most amps today?
Then again it could be that the pwm resolution is too low. There are
some quality i2s/spi dac hats which have rca or fancy balanced xlr
connectors.
> Yes but I dont' see code to control volume in nusb/audio/audio.c, only audiofreq and audiodelay.
>
> I will play with that after this.
Your amplifier should also be able to do this.
next prev parent reply other threads:[~2021-12-03 3:32 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-02 20:18 adr
2021-12-02 23:02 ` hiro
2021-12-03 0:30 ` Steve Simon
2021-12-03 1:43 ` Thaddeus Woskowiak
2021-12-03 2:13 ` adr
2021-12-03 1:35 ` adr
2021-12-03 2:55 ` Thaddeus Woskowiak [this message]
2021-12-03 5:04 ` Eli Cohen
2021-12-03 5:09 ` Eli Cohen
2021-12-03 5:15 ` Kurt H Maier
2021-12-03 5:28 ` Eli Cohen
2021-12-03 5:32 ` Eli Cohen
2021-12-03 7:45 ` the lemons
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