Querying available buffersizes and sample-rates requires access
to the device. Almost all ALSA devices are limited to
a single user-space application so we unconditionally try
to request access to the device.
Even though SIGINT is intended to be sent from terminals only,
it is more successful at terminating various child processes than
closing stdin and sending SIGTERM.
This is really just an example synth (sine wave + fixed
basic ASR envelope).
Note: existing sessions using the synth are not affected, the
script is saved with the session.
This effectively triggers a Session::request_overwrite_buffer
via Playlist::notify_contents_changed when the time-domain of a
Region changes.
When the time domain of a MIDI region changes, Region boundaries
and events positions change ever so slightly. The playlist has
to be rendered again to take this into account.
When MIDI regions with different time-domains are layered, notes
may not be resolved in correct order. Previously changing time-domains
to address this did not result in the playlist being reread.
This adds a special case of "flush/resolve" to restore the
state of an upper layer opaque MIDI region while at the same time
resolving notes of a lower layer region.
This honors transparent/opaque property of MIDI regions.
Previously all MIDI regions played as if they were unconditionally
transparent.
Further work is needed for backwards compatibility (and default
setting).
The iterator into the model can become incorrect in the sense that it is no longer the correct
next event to play. This can happen at least with a tempo map change, and possible under other
conditions. Catch this when it happens, and act as if we reached the end of the trigger
