- Tape Deck Functions: In Off-line mode (i.e., Local mode), operators can use the machine as a usual tape player; it provides usual tape deck modes of Play, Stop, Rewind, and Fast Forward. By pressing the PLAY button simultaneously with the 2nd FUNC button, the machine enters Reverse Play mode to monitor the sound of tracks which are played in the reverse direction in normal forward playback. Pressing the RWD or F.FWD button simultaneously with the 2nd FUNC button places the machine in Reverse or Forward Library Wind mode in which tape is wound at half the speed of normal fast winding to provide smoother tape pack for storage. In On-line mode (see below), local tape deck operations are disabled.
- Playback Head Selection: The machine has 1/4" 2-track and 1/4" 4-track playback heads which can be selected by a switch on the control panel.
- Original Tape Speed Selection: Tape speed at which the tape was originally recorded can be selected from: 38 cm/s (15 ips), 19 cm/s (7.5 ips), and 9.5 cm/s (3.75 ips) on the control panel.
- Copy Rate Selection: Conversion speed can be selected from 4x and 2x. Playback speed in On Line mode is obtained by multiplying original tape speed by copy rate. Since the playback speed for copy operation is 76 cm/s (30 ips), 38 cm/s (15 ips), or 19 cm/s (7.5 ips), if the original speed is 38 cm/s (15 ips), selection of 4x mode is invalid: when the copy rate selection is incorrect, it is impossible to put the machine in On Line mode (see below).
- On-Line Mode: When this mode is selected by the ON LINE switch on the meterbridge, the copy operation will start by receiving the start command from the ADC unit. During this mode, local deck operations on this player (e.g. Play, etc.) are disabled.
- Reel Servo: The proven studio master recorder MTR-15's reel servo system optimizes the tension applied to the tape, enabling gentle handling of old and valuable original master tapes.
- Output Level Adjustment: The SRL button and level trim control are provided for the adjustment of output (playback) level. By turning on the SRL button (LED on), the playback amplifier gain set to a predetermined level, allowing a tape recorded at the reference level to be played at the reference level. By disengaging the SRL button (LED off), the output level trim control is enabled, allowing the output level to be set to an arbitrary level.
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