Questions tagged [midi]
Musical Instrument Digital Interface
133 questions
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How to convert Maxim I2S MAX98357A Class D bridge-tied outputs to ground-referenced audio line out level?
I'm porting some excellent open source MIDI synth code by Marcel Licence - for reference see https://github.com/marcel-licence/ml_synth_basic_example. Marcel already has working code for several MCU's ...
- 23
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How to Make an Impact Sensor with MPR121 for an Electronic Santur?
I am working on an electronic Santur (a Persian hammered dulcimer) and need help designing an impact-sensitive sensor using the MPR121 capacitive touch controller. My goal is to detect both the ...
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2
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What's the point of capacitors on the data lines of a DIN MIDI connector?
So I took apart a MIDI foot controller (Behringer FCB1010) to replace the micro controller with a different one. One of the PCBs inside of it was this one:
So I measured it out and successfully tested ...
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Why does this design put capacitors on each pin of this connector?
This is part of the schematic of the Roland A49 MIDI controller:
This is the connector that makes the connection between the keyboard and the main board. PR0-7 and SC0-7 are scan signals, the program ...
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What options are there for multiplying clock pulses by non-harmonic values?
I have a MIDI clock signal which will output pulses at 24ppqn and a device I would like to synchronise which runs at 64ppqn. This is equivalent to a an ⁸⁄₃ clock multiplication.
My current method is ...
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At a high level, how to design MIDI-controlled audio switching devices for low noise?
I have several use cases for MIDI audio switching. Specifically, MIDI controlled AB pedals and mute pedals. Since these don't really exist, I will need to build my own. (Can you find a MIDI controlled ...
- 367
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How to power an audio-level meter / VU meter in a midi-controller project?
I'm building an Arduino-based midi fader controller, and want to also add an audio VU / Level Meter to the enclosure.
The Arduino is USB-powered.
I bought a standalone audio level meter on AliExpress, ...
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Pi Pico shorted after working fine
After working for a couple of weeks, a pi pico is just shorted.
It is used on a board that gets a midi signal as input and controls six mosfets as output.
When powered by usb maximum power is drawn, ...
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Identify component: SOT-23 "ADSL" "19"
Pictured is the power section of a midi controller mainboard. It's a PreSonus Atom SQ (The motherboard is labeled "BEEP_Main_Board_V3.0").
The sad story is that it was bought 2nd hand and ...
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Button multiplexing supporting multiple simultaneous button presses?
I'm looking to build a MIDI controller from some hardware I've salvaged, which includes 30 non-latching buttons and 30 LEDs. I'd like to base the system around an Arduino board (specific type TBD ...
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Problem sending MIDI message using Proteus Simulation Software
Im trying to send a MIDI message using Proteus Simulation Software. The idea is to send a NOTE ON, channel 1, C4 music note with velocity of 127. This three bytes are the following.
(Note ON/channel 1 ...
- 325
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470
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Using a potential divider to connect 12V input to 3.3V components
I'm planning a project which will involve converting an old pipe organ console into an electronic MIDI controller. I intend to use a Teensy 4.1 in conjunction with an array of shift registers to ...
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Is it possible to power an ATTiny85 and a 6N138 through MIDI in?
I'm working on a MIDI2CV board.
The schematic I'm working on is provided by the website of Kevin's Blog.
The MIDI cable comes the MIDI out of a Digitakt. It has 5V on pin5.
I was wondering if it is ...
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How can I connect multiple potentiometers (~20) to my Arduino without having to have 20 analogue pins?
I'm trying to build a MIDI controller and I'm looking for a clever way of using 20 potentiometers without having to have 20 analogue ports on the Arduino. So far all the functionality I need is for ...
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How do I successfully transfer MIDI OUT signal to Windows 7 (32 bit) Desktop PC? [closed]
Things I have:
I have an old type MIDI input device (Piano Keyboard Panel) which has a MIDI "OUT" port (female type jack) that has 5 holes. (and no USB port). it has a 9V power input (AC ...
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