New dacHandler board for piggy back mount on Teensy4.1

The dacHandler piggyback board arrived and I immediately machined a hole for the reset switch, but the positioning is delicate, interfering with the X’tal at the very last minute. A jig for writing data to FPGA was fabricated. Then, the firmware was written to the FPGA. Initially, the writing failed because I had forgotten that

Hand driven 8 step sequencer on 2 voice mode

A manual 8step sequencer is implemented in 2VoiceMode. The steps are sequenced by the left hand trigger point. Actually, it is a mode dedicated to “The Thing” performance, but its versatility is ensured so that the harmonic relationship can be set by microSD. Updated UI for 8stepChordSequencer. “34” is the address of ChordMemory and “(0)”

Programming the firmware for ribbon controller

I asked a question to Chat GPT how to build a code to convert Log Value to Linear Value based on the value sensed by Trill. // Function to convert V/oct voltage to frequency in Hz float vOctToFrequency(float vOct) { return referenceFrequency * pow(2.0, vOct); } then, the above answers were obtained. The resolution of

Reassigning the delay line outputs

When the theremin delay signal that had been allocated to outputs #1/2ch is changed to outputs #3/4ch, the separation and intelligibility of the sound image are dramatically improved, and the Transition becomes more effective. Similarly, the Looper’s Delay signal, which had been allocated to #3/4ch, is distributed to #1/2ch. The results are generally good, but

A major error of “mishandling of global variables” placed in the LPF

A major error of “mishandling of global variables” placed in the LPF was discovered and corrected in the relevant section. The variable that buffers the audio in the code that builds the LPF was shared among the outputs of Wavetable, resulting in a near-monaural sound output configuration, but the problem was solved by adding a

Adding “Depth” to LFO parameters

After adding “Depth” to Modulator’s parameters, I put together the display of parameters related to LFO on one page. I came up with the idea of linking the assignment of the Depth setting parameter in the Modulator to the DelayTimeRange parameter in the 9th item of mode4. The LCD display has Rate/Depth/Feedback in place.  The

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