tele_player
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Pots always have limited turns, most are less than 360 degrees, and some are 10 turn and more, for special applications requiring fine adjustment. Digital pots is a misnomer sometimes used to refer to rotary...

The link in post #19 is for encoders, not pots. These will work: ...

Encoders have advantages in some situations. For instance, when it will be used for multiple functions, or selecting from a variable length list, or where the value doesn’t matter (like a volume control), and where the...

Yes, and that's exactly what I thought when he first switched from 3.2 with muxes to 3.5. The confusion came up when he mentioned encoders.

Yes, 3.5 has more I/O than I thought. Still, I would use pots for this, as an encoder’s position cannot be determined visually. Also, look at the image in the original post. Each knob is marked with a min and max...

Just google 'rotary encoder Arduino' and you'll find examples of how to use rotary encoders.

That's not how rotary encoders work. They need two I/O ports, and power or ground. And another port if they also have a pushbutton. Neither your mux idea, nor your muxless idea, will work with rotary encoders.

I’m confused by ‘digital encoder pot’, but will assume you mean pot. Not to be confused with rotary encoder, (aka quadrature encoder) which uses more pins. Eliminating the muxes simplifies coding a bit, but mixes...

I've been thinking of doing something quite like that. The software isn't difficult. Do you have schematics? Looks like LEDs are present? Where are they connected? Are the buttons momentary contact, or latching?...

I apologize, you misunderstood my meaning. I see that you are trying to use frequency detection. But for what purpose? Why is the frequency range 85-400 Hz? What should happen if the sender repeats a frequency? Are...

I wonder what is the purpose of this exercise?

Yes, but that's because the built in DAC is 12 bits, and the others are 16. That's not really a qualitative issue. Whatever DAC you use, you need to scale the input to not exceed the number of bits.

The DAC isn’t concerned with how much polyphony is going on.

I made a slight effort to build the dev code, but there's some kind of conflict or dependency, I'll try to figure it out tomorrow.

Yes,, MIDI out using serial is easy, details are on PJRC site. https://www.pjrc.com/teensy/td_libs_MIDI.html

Dacs aren't an issue for this project, The Teensy Synth series on YouTube uses a Teensy 3.2 and Teensy Audio Shield (which is an external I2S DAC). For MIDI, it supports both USB MIDI device (Teensy 4 can't do that...

Don’t be disheartened, just take it one piece at a time.

Ahh, thanks for the correction, I misremembered.

USB Host firmware for Teensy 4 isn’t ready yet, and involves making connections to pads on the bottom of the board. USB Device isn’t ready, either. Currently, the only way to do MIDI on teensy 4 is serial with DIN...

Teensy 3.6 is more appropriate. USB host, 2 DAC, but it gets a bit involved if you need more than about 3.3 octaves. Maybe you could sell what you bought? You described this as a hybrid, but all you really want...

I googled ‘teensy MIDI to CV’ and found much information on this topic, including one which uses a Teensy 2 to produce 3 channels of note,velocity and gate/trigger, from USB. If you need DIN midi, that easily done, and...

You should probably clarify what you mean by “analog/digital hybrid synth”.

Ahh, now I understand. I searched the same places...

That device looks perfect. Why do you think it’s unobtanium? It shows 862 in stock, and $22 seems fair. Maybe you are confused by the US decimal point?

With MAX_NOTES at 128, I can force XRUNS by pressing sustain and playing many notes. With MAX_NOTES 64, it's much better, I couldn't get any XRUNS. While all this CPU power is nice, USB Host support, as on T3.6, is...

Same here.

I have it at 128 now. It plays fine, though sound gets a bit garbled above about 50-60 notes (using sustain pedal). Release the pedal, everything is back to normal.

I don’t know if anybody else has tried, but yesterday I put MicroDexed on a T4 with PT8211, using DIN MIDI. 600Mhz allows for a large number of simultaneous voices. Next I need to hook up some encoders and the LCD.

T4 has 4x as much RAM as T3.6 - so 2.41s limit seems low to me.

Thanks, I got it working.

Snowday, I haven’t had luck finding how to wire up the PT8211 with T4. Can you tell me? Thanks