Synthonico
Press keys on your keyboard to play notes. Hit Esc to stop all notes.
Press and hold the Insert or Delete keys while holding any note to use the manual slide.
Frère Jacques (Are You Sleeping?) 7 8 9 7 , 7 8 9 7 , 9 p [ , 9 p [ , [ ] [ p 9 7 , [ ] [ p 9 7 , 7 t 7 , 7 t 7
Use the controls to create your own synths.
Record and save your audio using the Start Recording button.
After clicking Stop Recording, right click the download link and save as.
Use Num + to start recording and Num - to stop recording a single webm track.
Add tracks and listen to them while you play using the tracks at the bottom.
Record all tracks and any notes you play at the same time using the Wav recording.
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Hello from the creator of Synthonico. Synthonico uses a unique keybind layout that takes practice to master. There are several advantages to the system that make it a unique instrument. Synthonico's range allows for a wide variety of music and songs to be played while remaining compact and focused. The available notes cover a chromatic scale from C2 (MIDI note 36, frequency ~65 Hz) to C5 (MIDI note 72, frequency ~523 Hz), spanning three full octaves. Synthonico's key mappings correspond directly to MIDI notes C2 (36) to C5 (72). Synthonico is under construction, but it does a good job allready if you want to play. If anything stops working you may have to reload the page to fix it, especially if you are running the sequencer at a fast BPM or Echo. |
Here are some techinques that might help beginners,
{n5 q 3} when played together these three notes make a E chord with a deep tone.(n5 means numberpad 5)
{2 y} Makes a D chord
{1 t} Makes a C chord
{q e 5} Makes a E chord
{1 r} Makes a F chord
{2 t} Makes a G chord
Copy and paste any song or melody you made up or played, (substitute chords for single notes) just play it into the sequencer and copy and paste.
If you wanted to translate it back into a piano or a midi use the corresponding note shown in the note indicator at the top. (A reverse keyboard to chord translator is planned for the future.)
With some practice, Synthonico's computer keyboard layout allows for rapid speed with little fatigue due to its compact nature and easy to activate keys.
This allows players the ability to rival the greats without much effort, once they learn the skills of speed, timing and the proper notes to play.
Synthonico allows for increased learning. By using the number pad to pluck bass notes while playing notes and chords with your left hand can build the skills of guitar.
This is because if you are plucking with the right hand and forming chords with the left it is very similar to the hand motions you use in the guitar, as well as the piano.
Synthonico also can teach you how to use synthesizers, as it's built in controls are similar across all synthesizers.
Now with transpose and passive compressor! The passive compressor reduces gain when playing multiple notes at once to form chords.
Auto Slide will automatically slide from each note you play to the next in the selected amount of time.
Manual slide any note or chords just press the Insert or Delete keys, you can increase or decrease the amount in the Manual Slide settings.
The Cutter, cuts gain (volume) in and out at a set volume % and frequency, low is the time gain holds at low volume, high is the time gain holds at high volume.
Cutter settings for tremolo set both High and Low to a equal setting.
Cutter "ratio" for skipping beats depends on the BPM.
Try playing sequencer preset 12, then turning on the cutter and setting the volume percent to 90-100% set the Low at .30 and the High at .06 and
you can hear how it skips the beat around when you get close to the right frequency.
Echo, causes any note to repeat after a set amount of time, for a set amount of times. Fade will cause the notes to fade in volume as they repeat.
The Sequencer plays back notes based on keyboard shortcuts. Allows direct recording and playback of key presses.
Marriage, causes two notes to play instead of one, you can offset the time and the pitch of the second note.
Threshold prevents gain from peaking and allows for more far out synths.
Bass Gain: Adjusts the boost or cut in low frequencies for deeper bass sound.
Bass Freq: Sets the frequency threshold below which bass gain is applied (e.g., 200Hz default).
Treble Gain: Adjusts the boost or cut in high frequencies for brighter treble.
Treble Freq: Sets the frequency threshold above which treble gain is applied (e.g., 2000Hz default).
Distortion: Adds harmonic distortion to create gritty or overdriven tones (higher values increase intensity).
Attack: Determines the time for the sound to reach full volume after key press (in seconds).
Hold: Causes notes to drop into release after a set amount of time, even when being held down (Set to 0 for infinite hold).
Sustain: The note remains at full volume after the key is released or the hold time expires (in seconds).
Release: Sets the time for the sound to fade out after key release (in seconds).
LFO Rate: Sets the speed of low-frequency oscillation for vibrato/tremolo effects (in Hz).
LFO Depth: Controls the intensity/amplitude of the LFO modulation (in Hz deviation).
Oscillator Mode (Waveforms): Chooses base sound shape (sine: smooth; square: hollow; sawtooth: buzzy; triangle: mellow).
LFO Mode (Waveforms): Selects LFO shape for modulation (sine: smooth; square: abrupt; sawtooth: ramping; triangle: linear).
Delay: Causes any note to repeat after specified time, but only if the key/note is being held or is in sustain or release.
More than 3 keys won't work at a time.... This issue is caused by hardware limitations in many standard computer keyboards,To handle more simultaneous notes in Synthonico (or similar applications), you'll need a keyboard with higher key rollover support, such as a mechanical gaming keyboard rated for 6-key rollover (6KRO) or full n-key rollover (NKRO). The Synthonico code itself does not impose this limit and can support polyphony beyond 3 notes if the keyboard hardware allows it.
SYNTHONICO was created on 9-27-2025 by @ThatMidLifeMale using Grok AI.