About The Pro-One Basic Operation Front Panel Back Panel Routine Maintenance Service

Section 1: Basic Operation

1—6 Sequencer

The Pro-One's 40-note sequencer allows you to record themes, riffs, walking bass lines or the like. All sequenced notes and rests are single-step recorded with the same duration. (Unlike “real-time” sequencers like our Model 800 and Model 1015, the Pro-One sequencer does not record notes of varying duration.) No matter how unevenly you record a Pro-One sequence, it will always play-back with all notes and rests evenly timed. The playback speed is controlled by the LFO/CLOCK FREQUENCY knob. The 40-note memory capacity is divisible in any proportion between two “banks”, referred to as SEQ 1 and SEQ 2.

When the Pro-One is switched on, its sequencer is preprogrammed with a 20-note ascending scale in SEQ 1 and a 20-note descending scale in SEQ 2. Provided the PLAY-RECORD switch is down, you can now hear these two sequences by just switching the bank selector to SEQ 1 or SEQ 2.

To record, first switch PLAY-RECORD up, then select SEQ 1 or SEQ 2. Simply play the notes on the keyboard, inserting rests by switching from RECORD to PLAY, then back to RECORD. Rhythmic variations can only be arranged by inserting rests. All notes must be played detached, as you would in NORMAL--as opposed to RETRIG--mode (see paragraph 1-4). A sequence cannot begin with a rest.

Be sure to not exceed the 40-note capacity, or the sequence will be destroyed. When the 41st note or rest is entered, the first 40 notes are cleared. The bank then contains one note.

When finished recording, first switch the bank selector OFF, then switch from RECORD to PLAY.

When switched to PLAY, the Pro-One will sequence the notes and rests you recorded in the selected bank at a rate set by the LFO/CLOCK FREQUENCY knob. (Or, the sequencer can be advanced by pulses at the GATE/CLK IN jack. See Section 3.) The sequence will play continuously (“loop”) until the bank selector is switched OFF.

When both memory banks are being used, care must also be taken to not exceed the 40-note limit. The Pro-One assigns memory priority to the bank which is currently being recorded, and will “steal” notes from the other bank once the 40 total note limit is reached. For example, if SEQ 1 already has a 25-note sequence recorded in -it, you will erase SEQ 1 if you attempt to record more than 15 notes in SEQ 2. (SEQ 2 then retains the additional notes.)

As shown in Figure 1-0, the Pro-One's keys are named C0, C#0, D0…through C3. In playback, the entire sequence can be transposed over a two-octave range by just hitting a key between C0 and C2. The transposition is equal to the interval between C1 and the key played. For example, to transpose down a fifth, hit F0. To transpose up a major seventh from the original key, hit B1. To transpose back to the original key, hit C1.

The sequencer memory banks will retain their contents until power is switched off (or interrupted). Any transposition is cleared as well.

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