Now let's concoct some code in which Grace randomly selects from a list of OSC messages to send to Ardour : Send("osc:message", "/ardour/transport_stop") Send("osc:message", "/ardour/transport_play") Open the OSC connection between Grace (sends on port 7779) We'll begin with a simple example that toggles the playback and stop states : Fortunately fellow Ardourista Gwen Coffy has prepared a list of OSC message types for Ardour and their formats. Ardour has many controls, all of which are or will be accessible through MIDI and/or OSC. However, before we can send any messages from Grace we need to know in what format Ardour expects to see them. Let's look at a simple example of code designed to control some aspect of Ardour via OSC messages.Īrdour does not enable its OSC connection by default, so first we need to access its Options/Misc Options menu and activate the Use OSC item. This feature is very exciting to those of us who like to play around with algorithmic mixing. The latest versions of Ardour include support for controlling that DAW with OSC messages (Figure 10). It is sufficient here to note that Grace works exactly as the OSC-aware programs described in my article.įigure 10. I've described OSC in a previous article, so I'll refer readers to that article for the missing background. The Open Sound Control (OSC) data transfer protocol is also supported by Grace. Sweet, and very helpful in the production cycle. else make it a quarter note (crotchet)ĭur: #?(off LilyPond -> viewer chain. if off is less than 10 set the note duration create a fomus note message with delta time of off loop for the value of off in steps of 1/2, a for loop that defines the voice number, i.e. Bear in mind that due to the nature of the algorithm the score will be different for each run of the code. The following example shows off FOMUS at work in Grace. FOMUS - the name stands for "FOrmat MUSic" - is not a notation editor, but its output can be edited in the targeted programs. Happily, the awesome LilyPond is one of those packages, giving Linux users the opportunity to see the outcome of their algorithmic procedures turned into standard music notation. This program takes your Grace output and converts it to a format compatible with the Finale, Sibelius, Common Music Notation, and LilyPond music notation packages. Grace has made the process even easier.ĭavid Psenicka's FOMUS is just too cool. I've used Common Music many times to create large-scale scores that would have been impossible to realize without its help. 5 and 2.5 seconds.Ĭreating huge scores is a trivial matter with this sort of code. In the example, the last three randomizations assign values to amplitude, frequency, and function-table number, after which a wait command instructs the repeat process to wait between. Those field assignments cannot be changed, but fields from p4 onwards can define anything else required by the opcodes used by the instrument. The first three p-fields are reserved for instrument number, start-time, and duration. Each randomization sets a particular value for each slot - called a p-field - in the Csound score statement. Incidentally, the resulting soundfile will be placed in the current working directory or in the directory specified by SFDIR, a Csound environment variable.įigure 8 displays the results of running that code. The default options should be okay for new users, while experienced Csounders will appreciate the choice to redefine those options at will. The Audio menu include a submenu of Csound-related function, including Grace's Csound Settings dialog (Figure 7). We'll use Grace as a generator for a Csound-formatted score, then we'll render that score to an audio file by using instruments played by the Csound synth. If you don't already know about Csound here's a description from the site :Ĭsound is a sound design, music synthesis, and signal processing system, providing facilities for composition and performanceįor present purposes we're interested in using Csound as a synthesizer. We've already considered Grace as a generator for MIDI files and realtime performance.
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