Roland VS-1824 owner manual Using Software Sequencers, Common Terms

Chapter 16 Using Software Sequencers

Synchronizing the VS-1824 with a MIDI sequencer allows you to add MIDI instruments without actually recording them to tracks on the VS-1824. Because the VS-1824 includes a 28-channel digital mixer, you can mix and process up to 10 live signals from a MIDI-based sequencing system along with the recorded tracks in the VS-1824. This can reserve the VS-1824’s tracks for recording vocals, guitar, etc.

This chapter explains how to synchronize the VS-1824 with some common software sequencing programs. If you are using a version of one of the following programs other than the one described in this chapter, it is likely the steps here will still apply—see the sequencer’s manual if the menus and settings you find are different from those in this chapter.

Common Terms

MIDI Clock

Used for synchronizing two or more MIDI devices. MIDI Clock (sometimes called MIDI Beat Clock) sends timing information based on the number of beats per minute (e.g. 120bpm). MIDI Clock is available on almost all sequencers and drum machines and is usually used in conjunction with Song Position Pointer (see below).

MIDI Time Code (MTC)

Another method of synchronizing two or more MIDI devices. Unlike MIDI Clock, MTC uses time-based information (Hours, Minutes, Seconds, Frames) to synchronize devices and does not reference a specific tempo or time signature. Because MTC uses a more complicated signal, it is not implemented on some devices. When available, MTC is usually more desirable for synchronizing audio recorders and tape decks. MTC is sometimes used in conjunction with MIDI Machine Control (see below).

MIDI Machine Control (MMC)

Transport and locate commands (Play, Stop, Record, etc.) that are transmitted through MIDI. MMC is used to control a device (e.g. the VS-1824) remotely. Another protocol (usually MTC) is used to provide the sync signal.

Song Position Pointer (SPP)

This MIDI message allows you to locate to any point within a song (e.g., bar 33, beat 4). SPP is normally used with MIDI Clock. It does not work with MTC.

Synchronization

When using a sequencer or a drum machine with the VS- 1824, it is often desirable for the two devices to start and stop at the same time. This is referred to as “synchronization.” Typically, you have a “master” device and a “slave” device. When the master device is started, the slave device will start at the same time. MIDI devices primarily use either of two methods for synchronization: MIDI Clock (often used with Song Position Pointer) or MIDI Time Code (sometimes used with MIDI Machine Control).

Sequencer Tracks

Tracks on the VS-1824 are similar to tracks on a sequencer. Just as you can record an instrument (or multiple instruments) on a track of the VS-1824, you can record MIDI information on a sequencer track.

MIDI Interface

A MIDI Interface is used to connect MIDI devices to your computer. There are various types of MIDI interfaces available to choose from. The setup procedure for your MIDI interface will vary depending on the type of interface and computer you are using. On the Macintosh, MIDI interfaces are usually connected to the printer, modem, or USB port(s). The interface is then controlled by the sequencing software itself or by one of three programs: Apple MIDI Manager, OMS (Opcode), or FreeMIDI (Mark of the Unicorn). On Windows-based computers, MIDI interfaces are usually connected to the serial port, parallel port, USB port, or directly to a sound card. Each interface will likely have its own software drivers that must be installed and configured for the interface to operate correctly.

MIDI Interface Troubleshooting Tips

If you are having trouble getting your MIDI interface to work properly, there are a number of troubleshooting techniques you can use to determine where the problem lies. On the Macintosh, most setup problems are the result of conflicting extensions in the System Folder. Try disabling any extensions that are not absolutely necessary for the program to run, and restart your computer. On Windows-based computers, most setup problems are the result of conflicting IRQ and/or Port Address settings. Make sure that each of the devices connected to your computer is set to its own IRQ and Port Address and that the corresponding software driver(s) reflects those settings. Defective or incorrectly connected MIDI cables are another common problem encountered when configuring a MIDI sequencing setup.

Chapter 16

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