The only difference from an ordinary Csound orchestra would be the use of the outch opcode rather than the more common outs opcode. Streaming audio from Csound to Logic on multiple channels is a fairly simple operation. Audio Router Bussing multiple audio tracks from Csound to Logic A simple tool for that purpose is Soundflower which will be explained below. The next step will be streaming audio from Csound to Logic. You will need to troubleshoot that problem to make sure your audio input/output is setup correctly. If you see rtevents, that means the MIDI connection is working but the problem is somewhere in the audio section. If no audio is generated, first check the CsoundQT console. 1, 0abass oscil kenv, icps, 1 out abass endi10 1f0 999 1, 0abip buzz kenv, icps, 1,1 out abipendininstr 2icps cpsmidikenv linsegr 0. sr = 44100kr = 4410nchnls = 10dbfs = 1instr 1icps cpsmidikenv linsegr 0. You should now be able to hear your Csound instruments triggered by the MIDI regions from Logic. Run the Csound score and play the Logic sequence. csd example below, for the score section, f0 is a dummy function table serving the simple purpose of running the score for 999 seconds. It will carry Note On, Note Number and Note Off, but not Velocity. Assign a cpsmidi opcode to control the frequency of your oscillator. To override this behavior you can use the massign opcode. MIDI channel 1 with instr 1, MIDI channel 7 with instr 7. Start by naming your instruments instr 1 and instr 2: by default Csound will pair each instrument with a MIDI channel of the same number (i.e. Therefore, as you can imagine, it is perfect for controlling the frequency of an oscillator. The cpsmidi opcode will get the note number of a MIDI event and translate it into cycles-per-second. Controlling a Csound instrument with MIDIĮvery single parameter of an opcode can be controlled by MIDI. All you need to do now is make sure that your instruments can all be controlled via MIDI. After hitting OK, Csound should be ready to receive MIDI. WARNING: your audio output device in Logic must be different from the one in CsoundQT or you will not be able to hear any sound coming out of Csound except for annoying feedback. Then set the RT MIDI Module to portmidi and choose your IAC Driver Bus from the Input Device drop-down list. Open up the CsoundQT Preferences window and select the Run tab. The process using CsoundQT will be covered, however, the procedure should be much the same for whatever front-end you are using. Let us now go ahead and set up Csound so that it can receive MIDI. It is now time to patch the router’s MIDI output ports to your Csound instruments' MIDI inputs. the IAC driver bus channels you selected from the Inspector). Logic instruments tracks) to the router’s MIDI input ports (i.e. ![]() Think of the IAC driver as a generic MIDI router (like a Motu MIDI TimePiece): what you did up until now was connect your MIDI controllers (i.e. Logic is now ready to stream MIDI to Csound. Create an object of any kind (a Monitor will do the trick) and connect the IAC bus to it. Open the Environment window (using cmd+8) and, in the upper left corner, select Clicks and Ports.
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