fab672000

Teensy 4.0 Cabsim project update. Hardware tested successfully. I had to bodge in a few changes, the final pcb will have all of them updated. Main PCB: In the final version i made both, the Teensy and the display pads offset, so they can be...

I have used the H11L1 for MIDI too, however, the DIP6 packages on the Pot/Bypass board are not for MIDI. They are part of an optional anti-click system, that mutes the output during the relay switching. Nice boards!

Thanks for the explanations, personally I would have liked to have the ouput in the rear, the high current digital signals shifted a bit on the right and the analog expression pedals on the left rear side, the midi on the middle right, but...

1590XX is a larger box compared to a typical stompbox sizes. For that reason i wanted to have the jacks on the top and leave the sides for any other connectors which might be added later (ie. MIDI). 9V input is not the noisiest point on the pcb...

Progress update: populated two boards, one used as testing bed for each circuit block and the other as "final". No major hiccups so far, added only a few changes, nothing requiring board reorder (which was not cheap - 4 layers over 100mm). Also...

Looking at the space allocation on the board, I have naive noise related questions to ask: it seems the 9v power is very close to an output jack, similarly the T41 board is in the middle of the board, why not prefering a digital+power signals...

>>> Using the Lead amp i too have noise and a bif of whining tone. If you're using the SGTL5000, be sure to disable its built-in highpass filter. While it is useful for ensuring that your signal has no DC offset, the filter can introduce a...

One major problem I see with the WM8731 is high DC offset that seems to originate from the internal gain stage. This directly impacts the ADC dynamic range to an unusable level, as the signal will clip on the affected side no matter how the HPF...

Sounds really good, my humble suggestion for your design is: please consider to maybe use 48Khz instead of 44.1Khz (or maybe an option for selecting it?): this would allow in future for integrating to other equipment like ADAT/SPDIF more easily...

The saga continues: based on the experiences gathered with the TGX4 i came up with an idea for a much smaller module type device to be used as a Stereo IR cabinet emulator + Reverb only. Such a module can be built into an analog...

I'm still deep in the GUI(ESP32) - Teensy integration. Preset System: supports up to 128 presets (if SD card is present) or 8 if using EEPROM only. EEPROM is still used to hold the 1st 8 presets. Acts like a backup copy, SD cards can fail...

Your project looks fantastic and I admire your productivity. Arriving to finished version in so little time is an achievement. I wish I could motivate myself to do more 🙂

Gui and the pedal itself in action:

GUI work is so time consuming... Expression pedal controlling the wah and updating the corresponding slider on the display: https://streamable.com/1jml92 BOOST section is renamed to PREAMP and contains wah + boost + octave up now. Also the...

On the GUI side: there is one main tab with quick access to the most used functions plus preset handling. All sections have their tabs with all the controls from the html page.

and painted, in Melon Yellow :)

Here is a next component for my audio effect library for Teensy4: Stereo guitar/bass cabinet emulation based on Uniformly-Partitioned Convolution Filter by Brian Millier. A PlatformIO and ArduinoIDE projects are available in the examples repo...