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    Channel mixdown: Simple average doesn't seem right?

    Hi Everybody. I'm tackling polyphonic synthesis, and have created eight 'wavetable' channels, each with short buffers, volume, pitch, and pan settings. This all works, except the way I'm mixing the channels down does not seem ideal: I do a simple average to avoid clipping, but that...
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    Ported a driver for a 7.84" 1280x400 bar-style IPS display

    Dang, that is a disappointment. The panel and controller are really well-made. I've long searched for an affordable bar-display to do a modern refresh of the venerable old TRS-80 Model 100 laptop with a focus on sound and music, and this one is perfect. I'm glad I bought two of them...
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    Adrift in a sea of #ifdefs

    mborgerson, I just want to say that I really appreciate the poetic title of your post. :D. Cheers.
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    Ported a driver for a 7.84" 1280x400 bar-style IPS display

    I first tried just sticking the SSD2828 init into your lib and changing the 8876 init, but no good. I must have overlooked something. It would be nice to combine stuff into an efficient, clean, generic library, but I know I would have trouble doing it. The 16-bit parallel methods in my code...
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    Ported a driver for a 7.84" 1280x400 bar-style IPS display

    This post from 2017 is asking for help with one. https://forum.pjrc.com/threads/59273-Ra8876?p=227998#post227998 In the thread you mentioned, I did try wwatson's code, and I think we were working from a very similar example code, but the displays were too different. I think the RA8876...
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    Ported a driver for a 7.84" 1280x400 bar-style IPS display

    Hi Everybody. I've been playing with this display, and it is very nice. They run down to 3.3V, drawing only 300 mA (in my case), and can connect via Parallel, SPI, or I2C. It has a RA8876 (gfx driver), SSD2828 (mipi bridge), GT911 cap. touch, 16MB SDRAM with DMA, font rom. Their...
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    QUAD SPI while using Audio Shield?

    Sorry, I think I got misled by an Ebay listing. So much for due diligence. They just arrived though and look very very nice. Hopefully regular SPI will not be too slow. Hate to tie up too many pins with the parallel modes. Thanks, Craig
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    QUAD SPI while using Audio Shield?

    I hope to use this very nice screen on an audio project. It has QSPI / SPI / Parallel . I want to try hooking it up with Quad SPI. Is this possible with Teensy 4.0 with the Audio shield connected? Thanks, Craig
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    Teensy 4.0 + Quad Audio + Flash Chip(s)

    Hi everybody. I'm doing my best to dig up the "for dummies" wiring guide for dual rev. D audio shields on Teensy 4.0, but have only turned up ones for 3.x. Looking at Paul's audio lib source for quad input / output, I think these are the additional pins used? Pin 6: 3&4 IN pin 32: 3&4 OUT...
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    Teensy 4.0 SDIO footprint

    Aha thanks for that. 1mm spacing on those pads. That's pretty close to the 1.1 mm on a lot of micro SD holders. Good point about the USB host, but with some kapton tape to cover them up, unused, maybe a kludge could work.
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    Teensy 4.0 SDIO footprint

    Hi Everybody. Are the SDIO pads laid out for a certain style SD card socket? I've been looking at ones on Digi-Key and can't guess which one might fit on there. It seems like some of the discrete components nearby might interfere with a PCB mount. Is the intent to have a flat flex cable...
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