1. Build binary locally using CMake
2. Copy binary to the device (user's home directory): scp .\build\src\ostrostroj ostrostroj:
3. Copy startup script to the device: scp .\scripts\ostrostroj.service ostrostroj:
4. Connect to the device ssh ostrostroj
   1. Move binary: sudo mv ~/ostrostroj /usr/local/bin/
   2. Move startup script: sudo mv ~/ostrostroj.service /etc/systemd/system/
   3. Install: sudo systemd install ostrostroj.service
   4. Start: sudo systemctl start ostrostroj
   5. Enable auto start on boot: sudo systemctl enable ostrostroj
   6. Create workspace sudo mkdir /srv/ostrostroj
      1. Change owner: sudo chown -R rado:rado /srv/ostrostroj
      2. Read, write for everyone: sudo chmod -R 0775 /srv/ostrostroj

• Option 1 manual run: ostrostroj /srv/ostrostroj/
• Option 2 run as a service :
  • sudo service ostrostroj start
  • sudo service ostrostroj stop

• journalctl -u ostrostroj
• service ostrostroj status

• For faster deployment cycle:
  • sudo chown rado:rado /usr/local/bin/ostrostroj
  • scp .\build\src\ostrostroj ostrostroj:/usr/local/bin/ostrostroj

This guide assumes that Elektron Syntakt is used as master MIDI device and Elektron Model:Cycles is used as a slave device (MIDI connections: Syntakt -> Ostrostroj -> M:C).

Create following directory structure and copy (scp) audio files to it:

• Workspace root directory (/srv/ostrostroj)
  • Project directory (01_domovy_poriadok)
    • Song directory (A01_kratke_dni)
      • Section directory (01_verse)
        • Mono loop audio files (L1.wav - L4.wav)
        • Stereo loop audio files (L5.wav, L6.wav)
        • Time warping can be disabled for a track by appending _nowarp to file name.
      • Another section directory (02_chorus)
        • Loop files...
        • Hint: use symlinks to reuse existing loop files
      • One shot files (S1.wav, S2_.wav, S5_melody.wav, ...)
    • Another song directory (A05_menej)

1. Create new project
2. Settings -> MIDI Config -> Sync: enable Clock, Transport and Program Change send.
   1. Note that Settings -> MIDI Config -> Channels -> PROG CHG OUT CH is set to AUTO which is set to 14. You'll need this to setup Model:Cycles.
3. Initialize MIDI Track 8 For a New Pattern
   1. Switch to a (new) pattern (A01 by default)
   2. Switch to Track 8
      1. Machine: MIDI
      2. SYN PAGE (MIDI Source): Channel 8
      3. FLT PAGE (CC Value): enable all by setting them to 0 (zero) by pressing FUNC + encoder
      4. AMP PAGE (CC Select):
         1. Loops (unmute + saturation):
            1. CC1 Select=CC #111
            2. CC2 Select=CC #112
            3. CC3 Select=CC #113
            4. CC4 Select=CC #114
            5. CC5 Select=CC #115
            6. CC6 Select=CC #116
         2. One-shot:
            1. CC8 Select=CC #119
4. Initialize Keyboard for Track 8
   1. KB SCALE = CHRO
   2. ROOT NOTE = C4
   3. KB FOLD = ON

1. Set Settings -> MIDI -> Sync -> PCH IN to ON.
2. Set Settings -> MIDI -> In Chan -> Auto In to 14. Check that PCH In is set to AUT.

TODO

Important: Use 1ST condition for each trig lock

By default all loops are muted so to be able to hear anything you must unmute a loop.

1. Select TRACK 8 and switch to GRID RECORDING mode.

2. Each step represents a single block of looped playback of the current song section. The number of loops can be changed in SONG MODE. The first step defines which loops will play the first time this song section is played. The second step becomes active after the next pattern change to this song section again.

   Example: We have a song with two sections: A01_verse and A05_chorus. We create 2 steps for the first section verse and we start the playback. Now the first step is active and it stays active until we switch to chorus. Then if we switch back from chorus to verse that's when the second step of verse is activated.

Create parameter lock for the step and the CC which corresponds to the loop that you want to control. CC value 0 means that the loop is muted. Increasing the value increases both saturation level and also wet/dry mix (127 is the max value).

All Model:Cycles tracks are muted by default after a pattern change. To enable an M:C track add MIDI note to the step that you want the track to be enabled:

• C3 -T1 unmuted
• D3 -T2 unmuted
• E3 -T3 unmuted
• F3 -T4 unmuted
• G3 -T5 unmuted
• A3 -T6 unmuted

Only 4 tracks can be enabled because Syntakt can play only at most 4 notes at a time.

CC parameter #119 is used to trigger automatic playback of one-shot samples. CC value between 1 and 10 select one-shot file with the corresponding number.

The problem is when we want to make a change (un/mute a loop or play a one-shot) but we want to keep the same song section. Syntakt doesn't send any MIDI messages related to SONG MODE. We need to do the following trick.

Notice that there is a gap between patterns of A01_verse and A05_chorus. We can use it to create an auxiliary pattern A02 but only on Syntakt, workspace structure remains unchanged. Now in SONG MODE we can add one row for A01 and then right after it we can add another row for A02. During playback Syntakt switches from A01 to A02 but because we don't have a section for A02, Ostrostroj falls back to A01. This triggers a pattern change which activates the next step of A01.

Auxiliary pattern doesn't (and probably shouldn't) have anything on TRACK 8. It would overwrite the main pattern A01.

Switch to TRACK 8, FLTR page and use rotary encoders A - E to change saturation level for individual loops. To avoid sudden audio change encoder must be first turned "to catch" the current value and then it can be used to change it.

Important: Avoid touching of the encoders during the first pass because it can mess up learning process.

Turn on Keyboard and play individual notes to trigger one-shot samples. See display to know which keys are mapped to samples.

All loop tracks are time-warped by default. It means that their tempo slowly randomly oscillates to make it more groovy and interesting. This can be disabled by adding _nowarp to file name.

Gracefully shut down the device by playing notes in sequence C#5 + F#4 + D#5 (TRIG 6 + 15 + 8) hold 3 sec.

Gracefully restart the device by playing notes in sequence F4 + D5 + G4 (TRIG 14 + 7 + 16) hold 3 sec.

Use when you want to reload projects after workspace update by playing notes in sequence F4 + F#4 + G4 (TRIG 14 + 15 + 16) hold 3 sec.

TODO: Not implemented yet