[$27] DIY PCM MIDI Sound module | SAM2696 & XIAO MIDI Synthesizer based

video upload by HAGIWO

"PCM MIDI sound module based on the Seeed Studio XIAO MIDI Synthesizer. It plays using external MIDI signals, and the four built-in buttons can also be used to change parameters. working documents (schematics & source code) https://note.com/solder_state/n/n1f2e... XIAO MIDI Synthesizer https://www.seeedstudio.com/XIAO-MIDI..."

You can find an overview video of the Seeed Studio XIAO here.

DIY eurorack modular synth | MOD2 Break beats : RP2350 based drum module

video upload by HAGIWO

"This module is an open source general-purpose Drum module based on Seeed XIAO RP2350.
Thanks to AI-friendly hardware design, it's easy to create software variations using generative AI.
With general-purpose components and a simple circuit, this module is affordable and DIY-friendly.

Break beats:
PCM break-beat playback module. Slice points are pre-programmed into the MCU and can be selected via CV."

https://note.com/solder_state/n/n33132a160afb

A $20 MIDI synthesizer based on the SAM2695 chip (#seeed #XIAO-MIDI-Synthesizer)

video upload by Floyd Steinberg

"Here's the #seeed 'XIAO MIDI' #synthesizer, a $20 box based on the #SAM2695 synth-on-a-chip and the XIAO ESP32-C3 MCU. You can get it here: https://www.seeedstudio.com/XIAO-MIDI... Table of contents:

00:00 quick sound impression
00:12 hi
00:38 hardware overview
00:57 default firmware
01:50 creating a firmware that actually supports MIDI (shoutout to @SimpleDIYElectroMusicProjects )
03:12 build a 5 pin MIDI in plug
05:23 some sounds: piano
06:20 saw wave pad
06:34 "crystal ep"
07:13 analog pad
07:27 'glass pad'
08:05 synth brass
08:23 drum kit
08:33 on NRPNs and SYSEX using @intechstudio 's GRID controllers
09:13 NRPN explained (Filter cutoff frequency control)
10:54 SYSEX explained (Reverb time control)
11:38 calculating the checksum
12:20 live tweaking demo
13:01 same, but using multiple tracks
14:25 conclusion; some feedback to SEEED

Also check out https://github.com/kinoshita-lab/MIDI... which uses the same chip but already has a MIDI capable firmware. https://www.tindie.com/products/kinos...

HÄLP ZIS CHANNEL

https://www.patreon.com/floyd_steinberg
https://floydsteinberg.gumroad.com/
https://floydsteinberg.bandcamp.com/"


Features 1: Zero-Barrier Creation, Perfect for Music Beginners

With three preset modes and plug-and-play functionality, you can dive straight into music creation—no complex setup required. Built-in speaker and four tactile buttons deliver an intuitive, self-contained experience that eliminates external dependencies. Start making music from the very first note, no prior expertise needed.

Features 2: All-in-One MIDI + Metronome – Smarter, Smoother Workflow

XIAO MIDI synthesizer comes with a pre-set Metronome Mode, where you can press the buttons to change your BPM and toggle the drum track to effortlessly sync rhythms and control your entire beats with one single device. No need for extra devices or apps.

Features 3: Pro-Grade Performance for Advanced Players

Open-source hardware/software architecture supports deep customization and advanced sound design. With 64-note polyphony and 128-note capacity, unlock limitless sonic possibilities—craft your own signature sound engine, whether you're a beginner or an audio hacker.

Features 4: Ultra-Portable & Fully Hackable

Pocket-sized design (71mm × 49mm × 28.5mm) lets you capture inspiration anytime, anywhere. The 3D printed enclosure is fully open-source for you to remix and customize—not just an instrument, but your personal music canvas.

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DIY eurorack modular synth | MOD2 VCO : RP2350 based drum module

video upload by HAGIWO

"This module is an open source general-purpose Drum module based on Seeed XIAO RP2350.
Thanks to AI-friendly hardware design, it's easy to create software variations using generative AI. With general-purpose components and a simple circuit, this module is affordable and DIY-friendly.

VCO:
V/oct tracking , 6 waveforms.

MOD2 is not a module designed for use as a VCO.
It has a limited number of CV inputs and cannot modulate the timbre.
It is a technical test program intended to verify functionality as a simple oscillator.

working documents
https://note.com/solder_state/n/nce8f...
https://note.com/solder_state/n/n2214...

PCB gerber data & PCB assy production data Download
https://www.patreon.com/posts/mod2-rp..."

DIY eurorack modular synth | MOD2 Sample Player : RP2350 based drum module

video upload by HAGIWO

"This module is an open source general-purpose Drum module based on Seeed XIAO RP2350.
Thanks to AI-friendly hardware design, it's easy to create software variations using generative AI.
With general-purpose components and a simple circuit, this module is affordable and DIY-friendly.

Sample player:
WAV sample player.
It is possible to save audio files up to a total of 20 seconds / 18 files.

working documents
https://note.com/solder_state/n/nce8f...
https://note.com/solder_state/n/na31f...

Code with WAV samples included
https://www.patreon.com/posts/code-fo...

PCB gerber data & PCB assy production data Download
https://www.patreon.com/posts/mod2-rp..."

DIY eurorack modular synth | MOD2 Snare : RP2350 based drum module

video upload by HAGIWO

"This module is an open source general-purpose Drum module based on Seeed XIAO RP2350.
Thanks to AI-friendly hardware design, it's easy to create software variations using generative AI.
With general-purpose components and a simple circuit, this module is affordable and DIY-friendly.

Clap:
TR-808-style digital snare: sine-wave with pitch envelope + blue noise

working documents
https://note.com/solder_state/n/nce8f...
https://note.com/solder_state/n/nd5c8...

PCB gerber data & PCB assy production data Download
https://www.patreon.com/posts/mod2-rp..."

DIY eurorack modular synth | MOD2 HiHat : RP2350 based drum module

video upload by HAGIWO

"This module is an open source general-purpose Drum module based on Seeed XIAO RP2350. Thanks to AI-friendly hardware design, it's easy to create software variations using generative AI. With general-purpose components and a simple circuit, this module is affordable and DIY-friendly.

HiHat:
white and blue noise base HiHat.

working documents
https://note.com/solder_state/n/nce8f...
https://note.com/solder_state/n/n171d...

PCB gerber data & PCB assy production data Download
https://www.patreon.com/posts/mod2-rp..."

DIY eurorack modular synth | MOD2 FM Drum : RP2350 based drum module

video upload by HAGIWO

"This module is an open source general-purpose Drum module based on Seeed XIAO RP2350.
Thanks to AI-friendly hardware design, it's easy to create software variations using generative AI.
With general-purpose components and a simple circuit, this module is affordable and DIY-friendly.

FM Drum:
Two‑operator FM percussion voice for Eurorack.

working documents
https://note.com/solder_state/n/nce8f...
https://note.com/solder_state/n/n5ff2...

PCB gerber data & PCB assy production data Download
https://www.patreon.com/posts/mod2-rp...

DIY eurorack modular synth | MOD2 Claves : RP2350 based drum module

video upload by HAGIWO

"This module is an open source general-purpose Drum module based on Seeed XIAO RP2350.
Thanks to AI-friendly hardware design, it's easy to create software variations using generative AI.

With general-purpose components and a simple circuit, this module is affordable and DIY-friendly.

Claves:
A simple claves sound source.
The waveform mixes sine and triangle waves at an arbitrary rate.
The pitch CV follows the V/oct.

working documents
https://note.com/solder_state/n/nce8f...
https://note.com/solder_state/n/ne976...

PCB gerber data & PCB assy production data Download
////In preparation (scheduled to be uploaded to Patreon)////

Please support me to continue projects.
In patreon you will find content about my background , technical information.
/ hagiwo

-------------------------------------------------------------
Repository of HAGIWO's DIY Modular Synth
https://note.com/solder_state/n/n54e0..."

MOD2 Prototype test | Seeed XIAO RP2350 based Drum module for eurorack

video upload by HAGIWO

":Almost all of the programs were generated by ChatGPT.
Since the circuit has been simplified, there are few CV inputs and the audio is output via PWM, but the RP2350 is fast enough that even a simple program can produce reasonably good sound.

Although there are no plans to use it as a VCO, it also supports V/oct.
-------------------------------------------------------------
Repository of HAGIWO's DIY Modular Synth
https://note.com/solder_state/n/n54e0..."

[$9] DIY eurorack modular synth Arduino Unison VCO w/ Seeed XIAO RA4M1

video upload by HAGIWO

"My 83rd original eurorack modular synth DIY projects.
Seeed XIAO RA4M1 based Dual Oscillator VCO.
You can create a thick sound by using detune or adding a 5th.

working documents (schematics , code)
https://note.com/solder_state/n/na0ae...

Python program for wavetable generation , Additive , FM and PWM duty. / 114675733

Seeed XIAO RA4M1
https://www.seeedstudio.com/Seeed-XIA..."

"Specifications

Eurorack standard 3U 6HP size

Power supply: 10mA (±12V), 20mA (5V)

2-oscillator digital VCO using Seeed XIAO RA4M1.

Supports V/oct, and the waveform can be selected from 16 types of wavetable.

The frequencies of OSC1 and OSC2 are always in a relative position relationship, and detune and overtones can be added by shifting the frequency of OSC2.

OSC1 FREQ POT: Adjusts the reference frequency of OSC1 and OSC2
OSC2 FREQ POT: Adjusts the frequency of OSC2 relative to OSC1. Can be set from 0 oct to 2 octs above.
OSC2 volume POT: Adjusts the volume of OSC2
OSC2 volume CV in: CV input for adjusting the volume of OSC2
Wave push SW: Selects the wavetable. 16 types in total.
V/oct IN: V/oct input, range is 0~5V.
OUT: Audio output, range is Vpp10V.

The selected waveform information is stored in EEPROM. When the power is turned on again, the last selected waveform is selected."

Seeed studio XIAO RA4M1 simple Arduino synthesizer : VCO for eurorack modular synth

video upload by HAGIWO

"Modular synthesizer VCO. using Seeed studio XIAO RA4M1.
Supports V/oct and audio output via built-in DAC.
This is an improved version of the UNO R4 VCO created in the past."

https://note.com/solder_state/n/n76a6b0a4a5d6

Hagiwo's 9$ DIY Chord VCO v2

[ $9 ] DIY eurorack modular synth CHORD VCO v2 with Seeed XIAO RP2040 | Raspberry pie pico

video upload by HAGIWO

"My 61th original eurorack modular synth DIY projects.
RP2040 based 5 polyphonic CHORD VCO , easy to play chord progression.
Built-in quantizer and autoharmonics.

working documents ( schematics & source code )
https://note.com/solder_state/n/n64b9..."

Diy Drum Sample Hagiwo Synthesizer

video upload by GlakGlikGluk

"This sample drum module was made with Seeeduino Xiao which processes wav data converted to binary as a sample program that is saved to internal memory, in my scheme I did not attach a trigger switch and bipolar voltage safety because I only used one 9 volt power supply. you can download the schema and the ino program that I'm already using on my google drive
.
Link :
https://drive.google.com/file/d/1vAIV...
.
Caution use a trigger below 3 volts otherwise you will damage it
.
BOM List
Seeeduino Xiao
IC Dual Opamp MCP6002/LMV358i
Rail to rail single supply
Led White/Red
Knurling Bolt/Flat head screw
SPDT togle switch
Female jack 3,5mm
Female jack 6,5mm
Resistor 33K/20K/10K/100 ohm
Capacitor 22nF
Elco 10uF/1uF
Regulator 78L05
Diode 1N4001
.
give a patreon donation so that Hagiwo's youtube channel can develop more, thank you
.
#synthdiy #drumsynth #drumsample #seeeduinoxiao #synthesizer"

Moog Memorymoog SN 1346

Note: links to listings are affiliate links for which the site may be compensated.

via this auction Pic of the inside below.

"SN#1346 Version 1.6 Firmware

This unit is 98% mint. There are a few minor scratches on keys and metalwork - but that's it. I would give the internals a 98% as well. All PCBs removed and thoroughly scoured out the Norlin problems. Everything works flawlessly."

How to Power up to 5 x Roland Boutiques from one USB Plug

via myVolts

Use CSRBSP at checkout to get 3.00 GBP off either a Roland Boutiques splitter cable or a Roland Boutiques splitter cable plus PSU, it’s good till Friday 31st March 2017.

Details:

"Power up to 5 Roland Boutiques from just one USB plug!

This unique myVolts 5-way power splitter lets you power up to five Roland Boutiques at once, from one USB mains power plug.

It's compatible with all the Roland Boutiques in the range - including the JX-03, VP-03, TB-03, JP-08, JU-06, TR-09 and A-01.

Option '5-way splitter PLUS PSU' includes the 5-way splitter PLUS a myVolts 5V 2000mA USB power supply adaptor, to power from one to five Boutiques.

Option '5-way splitter only' includes only the 5-way splitter, you'll need to supply your own 5V USB power adaptor. Each Roland Boutique draws up to 400mA of current, so if you want to power 5, you need a USB power adaptor capable of delivering 2000mA - like the one we bundle with it.

Cable features:

Main cable is 1 metre in length
Cable splits into 5 male plug connectors to fit the Boutiques, each one is 0.7m in length
myVolts-branded band keeps the cables tight
Canary yellow cabling makes it easy to spot amongst your other gear
Comes with a myVolts-branded Velcro cable tie
PSU features:

5V DC voltage output
2000mA (or 2A) maximum current output. Each Boutique draws only the current it needs from the max current available.
Worldwide voltage input AC100-240V, 50/60Hz
Worldwide plugs faces for UK / EU / US / AUD included - snap on and off in seconds."

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Yamaha CS15 SN 4331

Note: links to listings are affiliate links for which the site may be compensated.

via this auction

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Sequential Circuits Prophet 5 SN 4726 Rev 3.3 with midi and manual

Note: links to listings are affiliate links for which the site may be compensated.

via this auction

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SeeduinoArchmbed4StepSeq

Published on Jun 11, 2014 ryouichi harada·73 videos

"Seeduino　Arch"

This is the first Seeduino post on the site.

"Seeeduino is Arduino compatible board. Based on Duemilanove Schematic, 100% compatible to its existing program, shield and IDEs. On the hardware part, remarkable changes are taken to improve the flexibility and user experience.

Features
Inherits all of Arduino Duemilanove's features.
Compatible to Duemilanove's pin layout, screw hole and dimensions.
Evolved with SMD components
Improved on extensibility and convenience
Documents

Please visit our wiki page for more info about this product. It will be appreciated if you can help us improve the documents, add more demo code or tutorials. For technical support, please post your questions to our forum."

Korg MS-20 Analog Synthesizer SN 143475

Note: links to listings are affiliate links for which the site may be compensated.

via this auction

"Korg MS-20 Synthesizer with the earlier, grittier Korg-35 filter (check the MS-20 Wikipedia entry, if you're unaware of the difference!)..."

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