Devices

A 'driverset' is used to make your audio and MIDI devices available for use by MultitrackStudio. This driverset can be selected in the Studio->Devices window, currently the AsioSnd and WinSound driversets are available. On Windows Vista or newer there's also the VistaSound driverset. Clicking the Properties button will show the driverset's Properties window, which is where you can select the actual devices to be used.

The Audio Input Control and Audio Output Control (available from the Recording and the Studio menu respectively) can be used to set the properties (levels, input selection etc.) of the audio devices. The controls depend on the driverset and devices used.

The MIDI Out Device Options window (available from the Devices window) controls the behavior of the MIDI Out Ports.

MultitrackStudio Professional supports up to two audio channels, one MIDI In device and up to two MIDI Out devices.
MultitrackStudio Pro Plus supports up to 96 audio channels (using the AsioSnd driverset), up to four MIDI In devices and up to four MIDI Out devices.

Choosing a driverset

AsioSnd is the preferred driverset. It can only be used if the sound device comes with an ASIO driver. Latency can be very low.

VistaSound can be used if there's no ASIO driver for your sound device. As it name implies it works on Windows Vista or newer only. Latency can be low. The audio devices are used in exclusive mode, which means that other programs can't use the audio devices while MultitrackStudio is running. This includes the Microsoft GS Wavetable Synth, if you plan on using this to play MIDI tracks (which isn't recommended since latency is huge) you should use the WinSound driverset instead.

WinSound should work with any sound device. Latency is high.