Recent content by kallikak

Keep MIDI.read() in your loop and work more on optimising your OLED code. That's where the problem is. If updating a portion of the screen only instead of a clear and full update makes no difference, you must be overlooking something. Also, does it really matter if you are slow reading a clock...

You're thinking of the "unconditional contour" option on the MemoryMoog. It's not common, but an interesting option nevertheless - kicking off a cycle from a trigger rather than following a gate.

The help for the USB output object says this: "USB input & output does not cause the Teensy Audio Library to update. At least one non-USB input or output object must be present for the entire library to update properly." I haven't looked at the code, but quite possibly that's what you're...

I have a very simple example here LFO Modulation that might help. It has an LFO modulating both an oscillator and a filter with an independent amount control as well. It doesn't use an envelope, but inserting one follows exactly the same pattern.

And now version 2.

I don't understand why you would think I do - I explicitly stated that interrupts are better and more elegant. But from your comments it seems like you are new to this, so I tried to address some aspects that are relevant and understanding them should help you make a better solution. But...

Some thoughts: - memory is a non-issue for this application - interrupts are more efficient and more elegant to implement than polling (what you are calling the digital pin method, but both methods are digital) - if you are seeing such a big difference though, check your code. I reckon a...

You can daisy chain 8 MCP23017s off one i2c bus, giving 128 (interrupt capable) digital pins. That would support 64 encoders (if you're not using switches). And the Teensy 4 has 3 I2C busses, so you can support 192 encoders without having to do anything crazy. You will also have plenty of...

Your circuit is fine and won't damage the Teensy. it's very easy to get pins 4 & 5 mixed up on the DIN - that's what I'd check closely. Specifically - make sure you are viewing the connector from the intended direction. You might consider adding a resistor and LED off pin 6 (connected to VCC)...

I put together a Eurorack 4-operator FM voice using parts of the Dexed audio library object. Because I wasn't trying to recreate a DX7, I dropped various things (like the LFO, pitch envelope, detune, effects), changed others (coarse frequency down to 1/128 like the OpSix, ADSR envelopes...

I have just returned to this and your code looks very promising, so I had a go with the Audio Library object version. I am using a Teensy 4.1 and the problems I describe occur with both the audio shield and I2S into a PCM5102A. I have also built with the CPU speed changing from 600MHz to...

Thanks for spotting that - fixed. :-)

Sample and hold on an input noise signal is great for a rhythmic random cut-off changing, or for "robotic" sound effect pitch jumps. This app let's you play around with both: http://thewessens.net/synthbook/#sample-and-hold Lower the cutoff and increase the filter amount, and/or increase the...

I tried a few places - setup() was too late. Even startup_late_hook() was too late.

No one has any suggestions for how this might be manageable via software on powerup? My thinking now is a supervisor chip like a MIC803 connected to the reset pad is the best option - just a bit of a nuisance connection on the T3.2 Edit: Looks like putting a short delay (an empty loop) in...