Studio

The timeline: record your voice or guitar, write parts in the piano roll, and shape clips until the song is right.

Playing and moving around

The Studio with several tracks on the timeline — The Studio: the transport on top, the timeline with its loop, ruler and notes rows, and the tracks.

Control	What it does
▶ Play / ⏸ Pause	Play from the playhead, or pause.
⏮	Stop and go back to the start.
● Rec	Record on the armed tracks (see below).
Follow	The view scrolls along with the playhead.
BPM	The tempo. Type a value, or scroll on it: one step, `Shift` for ten, `Alt` for a tenth.
4/4	The time signature.
Length	How many bars the song has.
Snap: beat	What clips and notes snap to: bar, beat or off. Hold `Alt` while dragging to place freely.
Zoom	Zoom the timeline in and out.
Loop	Play the loop region over and over.

Click the ruler to move the playhead. Drag across the loop row to set a loop region; drag the region or its edges to change it.

Kinds of tracks

Under the tracks, Add a track offers three kinds:

Button	For
+ Audio	Sound files and clips: drag WAV, MP3, FLAC, OGG, M4A or AIFF files from Explorer onto it.
+ Input	Recording a microphone, guitar or anything plugged into your interface.
+ Instrument	Notes, played by a synth, the drum kit, a sampler, a plugin or a hardware synth.

Each track header has the same small buttons:

Button	Meaning
M	Mute
S	Solo: hear only the soloed tracks
●	Arm: this track records
MON	Hear the input through JamSesh while you play (input tracks)
A	Show the automation lane (Advanced)
C	Cue: listen on outputs 3–4, for headphones (only with a 4-output interface)
MIDI	Which keyboard plays this instrument track (Advanced)

Double-click a track's name to rename it.

Recording your voice or an instrument

Make sure your microphone or interface is set up in ⚙ under Inputs.
Press + Input. In Advanced you can choose the input channel and tick stereo.
Press ● on the track to arm it. Turn on MON if you want to hear yourself.
Press ● Rec, play or sing, and press ⏸ Pause to stop. The take appears as a clip.

Recording a guitar? The Tune button on an input track opens the tuner (Advanced).

Writing notes

Press + Instrument. It starts on the Keys synth; pick another sound in the track's instrument menu: Bass, Lead, Pluck, Pad, Drum kit, a sampler, External synth (MIDI) or Plugin instrument….
Drag across the empty lane to draw a note clip as long as you like (double-click makes four bars), or arm the track (●) and play the notes in: on a MIDI keyboard, or with Keys on your computer keyboard.
Double-click a note clip to open the piano roll. Choose the length of new notes under New notes (1/16 to 1 bar).
Click to add a note (you hear it on the track's instrument), drag it to move it, drag its edge to change its length, right-click to delete it.
A drum track opens a drum grid instead: one named row per drum, click a step to add or take away a hit, Shift-click for a hard hit. Repeat copies the first bars over the whole clip.
On the timeline, drag a note clip to move it and drag its right edge to make it longer or shorter; right-click for more.

The piano roll with a melody — The piano roll.

Play a melody in

The piano roll in C major, with the notes of a melody; notes outside the key are drawn dashed — A melody in the piano roll in C major. The two notes outside the key are dashed.

Double-click a note clip to open the piano roll. Press a key on the keyboard at its left edge: you hear that note on the track's instrument for as long as you hold it, and you can slide to other keys.
Click in the grid to add a note, or drag one to move it: you hear each note as you place it.
Press ▶ Loop (or Ctrl+L) to play this clip on repeat. Press it again to pause.
Arm the track (●), press Rec and play on your keyboard (Keys on your computer keyboard, or a MIDI keyboard): the notes go into the clip you have open. The clip keeps playing round, and every round adds to it.

Stay in key. Pick the song's key next to Key in the piano roll. Notes outside it are dimmed and drawn dashed. With In key ticked, a new note lands on the nearest note of the key, and dragging a note moves it along the notes of the key. Hold Alt to put a note anywhere. Untick In key to turn it off; JamSesh remembers your choice on this computer.

Timing. Notes you play into an open clip land on the nearest 1/16. In Advanced mode, Timing next to Repeat lets you pick Off, 1/16 or 1/8. A plain Rec with no clip open keeps your notes exactly as you played them.

Hum it. On a melody track, Keys and Hum choose what plays it: your keyboard, or your voice (you need a microphone under ⚙). Switching between them keeps the voice's settings. In Advanced mode, a recording you already have can become notes too: open the clip's inspector (⚙ on the clip) and press Notes from this hum. The notes land in a new clip on the armed melodic track (or the first one), in the song's key and moved to the instrument's range.

Playing into a clip is one undo: press undo once and the whole take goes.

Shaping clips

Do this	To
Drag the middle of a clip	Move it
Drag its outer edge	Stretch it, like tape: faster is higher, slower is lower (set it back with PITCH in the inspector)
Drag the small square at the top	Fade in or out
Drag the bar just inside an edge	Trim the start or the end
`Alt`-click	Split the clip where you click
✂	Slice: click twice on a clip to cut out a section
×	Delete the clip

The ⚙ on a clip opens its inspector: PITCH, VOLUME, PAN, a pan LFO (LFO RATE, LFO DEPTH, LFO SHAPE), and loop to repeat the clip.

Polish: clean up a take

In the clip inspector, the Polish slider removes noise and hum, evens out levels and tames harsh sounds in one go. In Advanced, Tune gently corrects the pitch of a voice.

Set Polish (and Tune if you like).
Press Polish. A polished copy is made; the original stays.
Switch between Original and Polished to compare. Changed the sliders? Press Update.

Notes on the timeline

The notes row under the ruler holds notes about the song. Double-click it to write one ("the guitar sounds too thin here"). If you work with an AI agent, it reads these notes, works on them and answers. Click a note to read the answer, Mark done or Delete it.