VSDSP Forum

I have a VS1053 chip on my board, playing well in all respect except: - on certain instruments (trumpet, MIDI Program 56) and others to some degree, I get distortion on higher notes. I'm sending MIDI through SPI to the chip. No other audio or data inputs. Output is through a headphone, or in this ca...

Brilliant! Implemented in 10 minutes. Thanks @pasi! For those interested, here's a snippet. I added the if (MIDIThroughSPI) clauses to two MIDI message sending methods. void dbMIDISynth::writeTwo(unsigned char a, unsigned char b) { if (MIDIThroughSPI) { uint8_t bytes[4] = {0, a, 0, b}; if (!WriteSDI...

Regarding MIDI through SDI while in RT MIDI mode: I have the VS1053b on my own board, running well with RT MIDI initialized at startup. Serial MIDI streams through the Rx pin work well. SCI commands work perfectly (tested for SCI_VOL, SCI_BASS and SCI_MODE for EarSpeaker). I'd like to try sending th...

All appears when when the crystal is oscillating, and the SPI query you suggested returns the correct result. I had a bad connection at the 1Mohm resistor. Now the crystal starts oscillating on power up. I'm still tracking down a failure to oscillate when I perform a reset on my main processor chip,...

I've just found that the 12.288 crystal is not oscillating when the above symptoms exist. When the crystal oscillates, I get proper pin values.
I'll let you know what I find out.

OK, I did have a wiring problem with XRESET, which is now addressed. After that fix (and resetting with XRESET LO for 100ms then left at HI), I get: - RCAP, LEFT, RIGHT and GBUF all are at 1.2v ... but DREQ stays low I have the following set up with resistors at startup. - GPIO0 pulled LO to 0v; and...

Thank you!

I’ve just populated my second board design with the VS1053. The first worked well. Another device on the new board shares the 1.8v power source. It has been pulling 1.8v up to 2.65v I’ve cut the trace to that other chip, and now the VS1053 has a 1.8v input. The VS1053 is not working as expected yet ...

Wait... found it here: http://www.vlsi.fi/en/support/download.html, then search for "eagle"

I have an old one (downloaded in 2019), I think from a zip file from VLSI (VLSI-eagle-lib.lbr) which now appears corrupt when loaded into Autodesk Eagle 9.5.0. I have a copy of the footprint from this library in my own library (copied years ago). It still seems to work. I attached a screen shot from...