TEENSY - USB Audio Interface

Learn how to turn a TEENSY Microcontroller into a USB Audio Interface!
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Intro: 0:00
Parts 1:26
Code 4:21
Demo: 10:19
Thanks! 11:11

[@aliveandwellinisrael2507]

PERFECT. I was *just* looking at different information on this yesterday! Thanks!

[@NotesAndVolts]

Glad to help :)

[@johnedwards8795]

Clear and useful demystification, as always. Thanks!

[@NotesAndVolts]

Thanks John!

[@jdarnell123]

Your content rocks the house! Thanks for your time and effort. 🙂

[@NotesAndVolts]

Thank you Chip!

[@PARASITSTUDIOEFFECTS]

Another top notch video. Short and to the point. Thanks!

[@NotesAndVolts]

Thank you :)

[@EqDior]

this is Awesome and very well explained! Definitely SUBBED!

[@NotesAndVolts]

Welcome aboard!

[@raindogred]

small enough to embed in a guitar body..usb guitar. And you could use some of those effects in the teensy..maybe add a rotary encoder and small screen on the guitar..that could be cool, if you could embed a cab sim in the code to, and the neccesary analogue i/o buffers for the guitar signal.

[@NotesAndVolts]

Lots of great ideas!

[@alvpjh]

great video, thanks 🙏

[@NotesAndVolts]

Thank you!

[@Influenceatplay]

Thank you

[@pierpa_76pierpaolo]

Interesting sound application with Teensy. i'm going to check out this usb sound module right now. Uhm makes me think that with this module I can restore my AKAI pad but in OS win XP version. :)

[@billbradleymusic]

Brilliant!

[@NotesAndVolts]

Thanks!

[@juliev123]

Excellent.

[@NotesAndVolts]

Thank you!

[@eross21]

very cool. what is the audio quality on something like this?

[@joeyfarrell4399]

Sorry if you discussed this already but is it possible to have more than 1 jacks in the Teensy? Could I have something like 8 inputs? Or is there a hardware limitation in the Teensy?

[@vinchelo]

thx!!!! Is it possible to make the audio output through usb and also through the physical output line out?

[@eross21]

is there a way to make this audio interface bluetooth. basically is like to plug a 3.5mm line in and record the audio in to my desktop day, or to my ipad daw ?

[@buf0rd]

You rock!

[@NotesAndVolts]

Yesss!!!

[@crippnipp7694]

I love the Roland J-6 you have there! Have you thought about getting the T-8 & E-4?

[@NotesAndVolts]

Definitely on my wishlist.

[@NamasenITN]

No concern for ground loops and maximal input voltage levels?

[@ErixSamson]

fascinating

[@NotesAndVolts]

Thanks Eric!

[@Timmyaguilar]

Hey love the content! Would love to see how set this as an audio output as well. For example - Synth In -> Plug In delay or Verb via daw -> Teensy Audio out? What would be the latency I wonder..

[@thomasfowler2964]

Yeah I'd like to see this too. It'd be awesome to have a compact way to plug it into a Pi to use as a Swiss army knife style FX pedal.

[@ShihWeiChieh]

Is it possible to make Daisy electro SM board audio interface too?

[@jonkruth4157]

Hello that is very cool but i have a question : it is possible to make an interface with DC Coupled out/inputs !?? That would be very phantastic !! it is possible ? Thank you for your nice work..i learn realy a lot from you !!!!!! cheers bro !

[@csvscs]

Very cool

[@NotesAndVolts]

Thank you!

[@MrAlessiop86]

Not sure if an audio signal from an instrument like guitar or bass can be connected straight to the line in of the audio board. Would it need an input buffer or some sort of preamp to bring the signal to line level? Anyway, your contents are incredible, thank you so much!

[@NotesAndVolts]

I think the audio board has an input impedance of 29K so a hi-Z input buffer would probably sound better.

[@rcdf9]

It is possible to put 2 teensy thru 1 usb and have two separate channels?

[@Muiota]

Good channel good content, I am using Teensy too

[@NotesAndVolts]

Thank you!

[@System-1541]

Why 12 blocks? That's pretty specific and not what I normally see in programs. Most teensy examples I've seen use 10 or 20. You're good with this stuff, so I'm thinking you have a good reason. Did you choose that number because the teensy 3.2 has a built in 12-bit DAC?

[@NotesAndVolts]

No real reason. I was working on another program that used 12 so I just went with it LoL.

[@System-1541]

@@NotesAndVolts I know what you mean. Every time I write a tcp network program I always use the port number that was in the example code in the textbook I learned network programming from. I figure that it's an obscure port that doesn't conflict with any other services, so why not.

[@christyler1647]

Awesome and thank you. I’m using a Teensy for a USB midi pedal (learned it from you) for my Boss Katana amp but it needs a computer interface to work. I’m using a Raspberry PI for that. Is there any way to do this with the Teensy?

[@NotesAndVolts]

Thanks Chris. I believe that the new Teensy 4.1 can act as a USB host but I have not tried one yet.

[@Ratchet2]

Teensy 4.1 is very nice. I use it with my MIDI foot pedals directly into the PC. I use a synth plug in and have a generic set of Taurus pedals on the cheap.

[@wesleifdl]

Muito bom 😃

[@NotesAndVolts]

Thank you!

[@gaborb6577]

Not bad quality. Could you make a guitar amp emulator out of it (how strons is teansy processing? Maybe a noise gate or a reverb or oveedrive can fit in.

[@NotesAndVolts]

Sounds like a good future project!

[@deaftone]

Great idea! Is this interface is class compliant? Do you think it will work with iOS? Thanks!

[@NotesAndVolts]

Hi Deaftone. It is class compliant and I didn't use any special drivers for the demo. Not sure about IOS compatibility.

[@Chamaelyon]

Yes, so far. I’ve been able to record a line in audio loop from a Casio synth demo into the Teensy 3.2 Audio shield using Reaper v6.81/OSX64 (Jul 4, 2023 release), and play it back with the Built-in MB Pro speakers, or my external audio interface, panning right and left, HOWEVER, I haven’t been able (yet) to get my (necessary) defined aggregate device to accept an input from the Teensy USB and output it to any of the other options, simultaneously. Working on it.

[@user-bz4cy5cf4r]

I can't get this to work. I got as far as having the Teensy show up as an audio device on my taskbar and in Audacity, but I can't get any audio in or out. I can see it playing audio (meter goes up and down) on the audio control on the taskbar, but there's no output on the headphone jack. Same with all the Teensy audio examples in the Arduino program. Bad hardware? Do I just need to add an SD card? This whole experience has been very frustrating. I usually design/build 100% analog stuff and it always works first try. Digital seems like it never works at all.

[@NotesAndVolts]

What version of Teensy and Audio Board do you have?

[@user-bz4cy5cf4r]

​@@NotesAndVolts 3.1 and Rev C audio shield. I got it working in the end. I went with a different pin header than what you used and I guess it just wasn't making a solid connection. Turns out LED only flickers when I'm touching my guitar (which is plugged into the teensy through a buffer) which is pretty weird. Some kind of grounding issue I guess. It still works fine though, I don't notice any other problems. I used their audio design tool to hook up the I2C to monitor the input and output at the same time. Next I just need to set up a button to turn that direct monitor on/off and maybe mono/stereo and I'll be fully done. I set the audiomemory a bit higher since I have no plans to run any effects or anything. I have pedals for that. Oh and the other thing is that there's a volume slider in Windows 7 for the output but it doesn't do anything. Not sure if that's fixable. Otherwise it works great, the input volume is perfect for guitar as-is, I don't even need a volume pot before the input. Thanks again, without recreating your setup code I wouldn't have been able to get the program to work. I'm not sure how they expected me to know that. Their design tool doesn't include that part. But I just retyped what you had in this video and it works perfect.

[@melaniewilson-bruneau9079]

Hey Dave, what about getting 24bit/96kHz audio?

[@NotesAndVolts]

Hi Melanie. Unfortunately this little guy will only do 16Bit/44.1Khz

[@guitinker]

Overkill. The Nyquist Frequency of a 44.1K sampling rate is 20,050Hz which is more than enough to hear all nuanced harmonics, unless you're a dog with an upper range of 65,000Hz. 16 bits is enough granularity to hear a SNR (ratio of the loudest to quietest audio) of 96dB. 24 bits will torture you at up to 144dB. The threshold of pain (for most mortals) sets in at about 120dB. Be careful what you wish for, and when marketing is talking, hold on to your wallet.😉

[@B1akTang1dH4rt]

@@guitinker unless you plan on mixing and mastering with that audio.

[@NamasenITN]

⁠Unless your application is SDR and not audio DSP...

[@ezraezra3130]

충격적이다 ㄷㄷㄷㄷ

[@MauricioJaguan]

What sampling rate can it do?? Is sounds quality good?

[@NotesAndVolts]

Hi Mauricio. 16 bit, 44.1 kHz sample rate (CD quality)

[@MauricioJaguan]

@@NotesAndVolts amazing!! One more question! What driver did you use? I don't think I saw it. ASIO4ALL?

[@NotesAndVolts]

@@MauricioJaguan I didn't use a driver. Just plug and play.

[@MauricioJaguan]

@@NotesAndVolts thank you!

[@wrmusic8736]

"old windows 10 computer"

[@NotesAndVolts]

LoL! I've had it a long time.

[@timpullen4941]

How does soLdering become soDDering?