niklasni1

There's no audio in module for MIDIBox yet, of course, but sync'd delay should be a piece of piss on a STM32F4 board..

There's no audio in module for MIDIBox yet, of course, but sync'd delay should be a piece of piss on a STM32F4 board..

I can't answer your question, but that's a very cool module!

As for the Spin, it only has three inputs for control, and they're all analogue. You can control the selected program from an MCU, but not advanced digital control of parameters. (Unless you emulate an external ROM for it and change the code on the fly, I don't know how hard that'd be to get to work?)

Are you sure that RA board isn't based on the Spin chip?

Where do you live? edit - just saw your user name...

Is there any way for MIDIBox applications (specifically the SeqV4) to send MTC? I'd like to sync an old-fashioned HD recorder..

That would require some coding, to merge the NG firmware with the sample player functionality.

Not sure the Discovery audio output could be called pristine quality, exactly. As I remember the wave playback demo is also a bit grungy.

Sounds pretty good... how much can you edit the sounds on this thing?

That's probably a lot easier than getting Cygwin running. Installing Ubuntu's about as easy as installing Windows if your hardware is supported, which it will be in the VM.

That's probably a lot easier than getting Cygwin running. Installing Ubuntu's about as easy as installing Windows if your hardware is supported, which it will be in the VM.

I'd say it's highly unsuitable for softsynths and sample players compared to the Discovery board, since it doesn't have an audio output...

Very nice!

The caps are normal bypass caps from the power supply line to the ground line of the ICs. These are mounted close to the chip to act as a small local current storage, so that when the chip suddenly draws a lot of current (like when it switches state), it can get some of it very quickly from the capacitor. This helps keep the power supply smoother in the circuit. (At least, this is my meagre understanding of it.) For all 74xx logic ICs like the shift registers on the DOUT modules, if you look at the chip so pin 1 is top left, the power supply pin is the top right pin, and the ground is the bottom left. The docs also specify a cap from the main power input to the main ground pin.

I don't really think of MIDI as slow. Certainly not too slow for sending <5 notes per second I will be... but higher baud rates could be interesting. Of course, what I really should be doing was to integrate the sample player with the sequencer and just run the whole thing on one core :smile:

Is it fine just to connect everything directly without an optocoupler? I've been told MIDI is weird electrically, but not really what that entails. Since they're in the same box, I'd prefer to use an internal ribbon cable over an external DIN5-cable...

I have the sample player running on my Discovery board.. wondering what's the best way to connect it directly to an LPC17 core? I've made room in my new 3D-printed Seq v4 "case" (more like scaffolding, really) for a Discovery board and mounted on some veroboard, and I was thinking of just using DOUT->DIN triggers but a MIDI connection would be nicer (velocity, etc). Any suggestions?

Shuriken -- I strongly disagree. If you know how FM works the parameters make perfect sense, and a good interface really helps learning. I spent a lot of time on Ableton Operator (part of Live), and after that even my TX81Z was a doddle (even though its interface consists of two arrow keys and +1/-1 buttons).

It's written as LED31.

http://www.midibox.org/dokuwiki/doku.php?id=wilba_mb_seq_construction_guide

Just so it's clear to everyone: It IS possible to misorient other LEDs than L31, so check all of them. Resoldering LEDs with cut legs is no fun.. :smile:

Nice! I'll give that a spin tomorrow night!

No, I don't. My mate who designed the board with SRAM and card reader has done some work with the TI Cortexes as well, he complained of similar things. It's like ST didn't really think the pin assignments through :/