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I did solve it actually, sorry I forgot to reply. Paul was right, it was entirely a grounding thing. In my case I solved the issue by making sure I was using the ground connections on the audio board to connect to the ground connection on line in / line out jacks, and all other ground went via...

Cool thanks. Speed is an interesting point, having mostly dealt with analog audio I've never considered just how much each buffer stacks up when you need high clock speeds for digital uses. So if SMD is the only option then SMD it is, Frank's memoryboard layout looks great, I'll order one and...

Hi, are there DIP equivalents to the 74LCX126MX and 74LCX138MX ICs used on this? I've love to make this, but don't have the skills or equipment to solder surface mount myself, and haven't been able to find anyone I can pay to do it for me either. I'm happy to make a big version on vero if there...

Didn't know that was an option, I'll give it a try. I'm pretty sure I remember this happening while running from a battery, from a phone as a source of audio, to headphones! That said I don't think I bothered putting a cap across the power rails or anything to try and actually fix it. I'll...

Awesome thanks for the advice. Depends how low level I'd have to go on option 1, may be out of my depth on that one! I'll take a look at option 2 as a start point instead if it's going to be a little easier. Just to confirm, there's no kind of standardised bypass toggle on the AudioStream base...

Just posting here to say I've had this same constant volume 344hz noise when using the audio adapter, but only when powering the Teensy from the Vin pin. All pins are soldered through to the Teensy board itself as the above post mentions so that one didn't work for me. But powering it via the 5V...

Hi, I'm using a Teensy to make a little multi effects unit. In this I'm planning to have "modes", where each mode is basically a set of effects / mixers etc with connections between them. A couple of buttons will allow selecting a different mode during program execution. No need for two modes to...

Amazing reply, thank you so much. Pushing 2 16bit samples through at a time makes sense, knowing that gives context to many of the functions in dspinst.h.

I've found on one particular project was able to make this occur by accidentally Serial.println()ing before Serial.begin() was called. Not reproducible from scratch, but I might have a go trimming down the project I have until it breaks if I find the time.

I'm getting into writing audio effects for Teensy, and have been reading through the source code for many of the effects already in the library. I'm ok when it comes to much of the maths as I've done DSP stuff before on regular computers, but I've never had to optimise them much and could rely...

I have the same question, but might be willing to go with a different approach. Is it possible to lower the bitrate or sample rate to extend the delay time? Just found this Teensy audio library and it looks incredible, really very feature rich and accessible compared to most audio libraries, but...