Audio hats

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English Guy
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Audio hats

Postby English Guy » Tue Jan 03, 2017 4:59 pm

Has anyone found a reasonable audio Hat for the Pi with acceptable input and output. All the ones I see are output only.

Frank Carvalho
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Re: Audio hats

Postby Frank Carvalho » Thu Jan 12, 2017 7:55 am

Bumping this thread for English Guy. I am also curious about dedicated audio I/O extensions to the Pi
Vox, Selmer, Yamaha and Leslie amplifiers. Rickenbacker, Epiphone, Ibanez, Washburn, Segovia, Yamaha and Fender guitars. Hammond, Moog, Roland, Korg, Yamaha, Crumar, Ensoniq and Mellotron keyboards. Xubuntu+KXStudio recording setup.

progwolff
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Re: Audio hats

Postby progwolff » Thu Jan 12, 2017 11:07 am

An audio HAT with high quality input would have to send this audio data to the Pi via the GPIOs. So even if a HAT had built-in high quality ADCs, it would have to stream the digital audio data to the Pi via the GPIOs. Without having looked at the schematics, I guess the GPIOs just aren't made for streaming. See https://www.kickstarter.com/projects/14 ... i?ref=live for a similar project, where someone tried to buid a HDMI input HAT.

Why don't you just use a USB audio interface?

Edit: Seems I was too pessimistic. Here you go: https://www.kickstarter.com/projects/12 ... he-raspber

Frank Carvalho
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Re: Audio hats

Postby Frank Carvalho » Sun Jan 15, 2017 3:03 pm

I do. But it would be nice to have a more compact solution than a clunky extra box with a power supply.
Vox, Selmer, Yamaha and Leslie amplifiers. Rickenbacker, Epiphone, Ibanez, Washburn, Segovia, Yamaha and Fender guitars. Hammond, Moog, Roland, Korg, Yamaha, Crumar, Ensoniq and Mellotron keyboards. Xubuntu+KXStudio recording setup.

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English Guy
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Re: Audio hats

Postby English Guy » Sun Jan 15, 2017 7:57 pm

I also wondered if a hat would give better latency.

Frank Carvalho
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Re: Audio hats

Postby Frank Carvalho » Sun Jan 15, 2017 9:21 pm

I can get near realtime latency with the external USB box I use. As I use guitarix on the RPi, latency is unacceptable. I can get it to run guitarix xrun free with a guitarix latency of 64. That requires a Real time kernel though, and some tweaking.
Vox, Selmer, Yamaha and Leslie amplifiers. Rickenbacker, Epiphone, Ibanez, Washburn, Segovia, Yamaha and Fender guitars. Hammond, Moog, Roland, Korg, Yamaha, Crumar, Ensoniq and Mellotron keyboards. Xubuntu+KXStudio recording setup.

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MattKingUSA
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Re: Audio hats

Postby MattKingUSA » Sun Jan 15, 2017 10:33 pm

This page claims high
3.5mm jack for Stereo Line Input for high quality audio recording or capture


http://www.ittgroup.ee/en/raspberry-pi- ... ry-pi.html
-Matt

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MattKingUSA
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Re: Audio hats

Postby MattKingUSA » Sun Jan 15, 2017 10:37 pm

This page claims high
3.5mm jack for Stereo Line Input for high quality audio recording or capture


http://www.ittgroup.ee/en/raspberry-pi- ... ry-pi.html

Here is a discussion i found on 24bit recording and sampling

http://cirrus150.rssing.com/chan-42334590/all_p2.html
-Matt

looplog
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Re: Audio hats

Postby looplog » Mon Jan 16, 2017 1:38 am

I haven't done extensive testing with mine yet, but the Audio Injector (surround version kickstarter was posted earlier) is a decent 2 in 2 out hat which can do 128 sample latency without performance tweaking. Its available on ebay or amazon. There is also one with midi i/o that looks promising at http://blokas.io/ but it seems to be in eternal testing.

Frank Carvalho
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Re: Audio hats

Postby Frank Carvalho » Mon Jan 16, 2017 5:22 pm

The pisound seems like the ticket for a compact solution. As much as I could figure from their blog, the final design is now made, and they are crowdfunding the next batch of boards. It really looks nice. With jack stereo input and output, 48k,96 and 192kHz, 24 bit gain control, volume control and MIDI in and out, it seems like the perfect match for music production.
The Audio injector(s) look interesting too. The Octo particularly with its 8in, 8 out balanced option.

/Frank
Vox, Selmer, Yamaha and Leslie amplifiers. Rickenbacker, Epiphone, Ibanez, Washburn, Segovia, Yamaha and Fender guitars. Hammond, Moog, Roland, Korg, Yamaha, Crumar, Ensoniq and Mellotron keyboards. Xubuntu+KXStudio recording setup.


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