iPhone app "JamTrack" is a step sequencer that you can easily compose, arrange, and performe your own music by using five tracks with Drumkit, Bass, Piano, Guitar and Brass. It's possible to turn your ideas into music quickly by touching the cells. Create your own tunes as you like!
FEATURES
5 Tracks![]() |
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| 1.DrumKit | 2.Bass | 3.Piano | 4.Guitar | 5.Brass |
EASY SONGWRITING
CHORD ASSIST
BPM, MIXER
Message
We gives a portion of the purchase price to the United Nations World Food Programme (WFP) .
Quick Start Guide
01.Quick Start
02.Basic Drum Pattern
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| beat 8 | beat 16 |
03.Song Sample
| Bar 1 | Bar 2 | Bar 3 | Bar 4 | Bar 5 | Bar 6 | Bar 7 | Bar 8 | |
| Brass | ||||||||
| Guitar | ||||||||
| Piano | ||||||||
| Bass | ||||||||
| DrumKit | ||||||||
How to use "JamTrack"
01. The MAIN SCREEN

1.BAR(MEASURE) PANEL
Bar panel shows the position of the current bar(measure). / shows the number of total bars(measures).
2.TRACK PANEL
Track panel shows the name of the current track.
there are five types of the track : "1:DrumKit", "2:Bass", "3:Piano", "4:Guitar", "5:Brass"
3.CHANGE BAR(MEASURE) POSITION
The bar(measure) position can slide forward/backward by touching the cursors .
4. MATRIX
Each cell can be activated by touching.
5.TOUCHED CELL
The color of cell will change when it's activated.
6.CHANGE TRACK
Move to other tracks by clicking the cursors.
7.COPY&PASTE
Copy button : Copy all the activated cells shown on the current screen.
Paste button : Paste all copied cells.
8.CODE ASSIST (Piano & Guitar Track)
After touching the root note and "CHORD TRIAD / CHORD MINOR" button, two notes that become the triad chord / minor chord are automatically added.
9.SETTING
Moves to the setting screen.
10.PLAYBACK (CURRENT BAR)
Start playing the music data of the shown bar.
11.PLAYBACK
Start playing from the beggining of the music data.
02.The SETTING SCREEN

1.BPM(tempo)
Change the speed of the tune.
2.ADD BAR
Add bar(measure) at the end of the tune.
3.DELETE BAR
Delete the selected measure/bar. All of the activated cells will be deleted.
4.MIXER
Open the mixer screen.
5.DATA SAVE
Save the current project.
6.DATA LOAD
Load saved data.
03.TRACKS AND BARS(MEASURES)

JamTrack only shows the selected measure/bar + track on the screen. It's one of the measures/bars of a track as shown above in the music score.
Screen "A" is a piano track of the second bar, so it is displayed in JamTrack like -
To move from screen "A" to screen "B", touch the CHANGE TRACK button.
To move from screen "A" to screen "C", touch the CHANGE BAR(MEASURE) POSITION button.
04.SONGWRITING

The matrix of "JamTrack" is similar to the keyboard of one octave. The bottom row is "C", the top row is "B" and the row displayed in the gray is black-key (#). The note will be activated by touching each cell.
05.RAISE/DROP AN OCTAVE
The octave of the note can be changed by flick-up / down when touching.
The bass track is a little different from other tracks.
Flick-up : the note will go up 1 octave and become a shorter note.
Flick-down : the note will be shorter.
Flick-left :the note will be a little shorter.
Flick-right : the note will go up 1 octave.
| Track | ![]() |
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| 5.Brass | raise 1 octave | drop 1 octave | --NA-- | --NA-- |
| 4.Guitar | raise 1 octave | drop 1 octave | --NA-- | --NA-- |
| 3.Piano | raise 1 octave | drop 1 octave | --NA-- | --NA-- |
| 2.Bass | raise 1 octave & shorter note | shorter note | semilong note | raise 1 octave |
| 1.DrumKit | --NA-- | --NA-- | --NA-- | --NA-- |
06.CHORD ASSIST (Piano, Guitar track)
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| E(TRIAD CHORD) | Am(MINOR CHORD) |
If you touch the root note and "CHORD TRIAD / CHORD MINOR" button, other two notes that consist the triad chord / minor chord will automatically be added.
For example, if you want to input triad chord "E", touch the cell of "E" first.
And touch
"CHORD TRIAD" button, two notes ( "G#" and "B" ) that become the "E" triad chord automatically be added.
If you want to input minor chord "Am", touch the cell of "A" first.
And touch
"CHORD MINOR" button, two notes ( "C" and "E" ) that become the "Am" minor chord automatically be added.
07.PLAYBACK
Start playing the music data of the shown bar.
Start playing from the beggining of the music data.
08.THE MIXER SCREEN

The output volume and the pan can be set on the mixer screen. You can change the volume of each track and master track by the slider that moves up and down. And you can change the pan (right and left) by the slider that moves right and left.
09.SAVE & LOAD
You can save your data / load your data on the Setting Screen.

















