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Table of Contents
iv ALESIS M20 REFERENCE MANUAL 1.06
13.8 Rewind/Fast Forward TC Output (Page 8)...............................................................................3
13.9 Unthread Timeout (Page 9).........................................................................................................3
13.10 Search Enable (Page 10).............................................................................................................4
13.11 Locate Before Play (Page 11).....................................................................................................4
13.12 Mute Until Lock (Page 12).........................................................................................................4
13.13 Dynamic Punch (Page 13)..........................................................................................................4
13.14 Track Groups (Page 14) .............................................................................................................4
13.15 Save Data to Tape? (Page 15)....................................................................................................4
13.16 Load Data from Tape? (Page 16) ..............................................................................................5
13.17 Tape Type (Page 17)...................................................................................................................5
13.18 ID Status (Page 18).....................................................................................................................5
13.19 User Bits (Page 19) .....................................................................................................................5
13.20 Error Rate (Page 20)...................................................................................................................6
13.21 Front Panel Software Version (Page 21)...................................................................................6
13.22 Software Version (Page 22) .......................................................................................................6
The LRC Remote Control....................................................................................1
Tutorials and Applications ................................................................................1
TUTORIAL 1: Multiple M20 Operation..............................................................................................1
Overview .................................................................................................................................1
Synchronizing Machines ........................................................................................................1
Automatic ID Renumbering...................................................................................................1
Master/Slave Interaction........................................................................................................2
Achieving Lock .......................................................................................................................2
Independent Slave Mode........................................................................................................2
Formatting Multiple Tapes ..................................................................................................................3
Master Format Enabled, Complete Format ..........................................................................3
Master Format Enabled, Format Extend...............................................................................3
Master Format Disabled.........................................................................................................4
Master Format Disabled, Format Extend..............................................................................4
TUTORIAL 2: Making Digital Backups..............................................................................................5
Dealing with Damaged Tape .................................................................................................6
Making a 16-bit copy from a 20-bit master...........................................................................6
TUTORIAL 3: Recording Digital Audio from Other Sources...........................................................7
Digital Clock Considerations.................................................................................................7
TUTORIAL 4: Combining M20s and ADATs ....................................................................................8
M20 Transport Speed .............................................................................................................8
Sample rate vs. Pitch Control.................................................................................................8
Input Monitoring ....................................................................................................................8
Polarity Differences ................................................................................................................9
TUTORIAL 5: Setting up Inputs........................................................................................................10
TUTORIAL 6: Updating M20 Software............................................................................................11
TUTORIAL 7: Using the M20 with Unbalanced Inputs and Outputs............................................12
M20 SMPTE Synchronization Overview ..............................................................1
16.1 Synchronization Basics.................................................................................................................1
Master or Slave?......................................................................................................................1
Digital Timing Requirements.................................................................................................1
16.2 The One Clock Principle..............................................................................................................2
16.2a House Sync ...................................................................................................................2
16.2b “Genlocked” Time Code...............................................................................................2
16.3 Reference Counters vs. Clock Sources .......................................................................................3
16.3a Location Reference........................................................................................................3
16.3b Reference Clock.............................................................................................................3
16.3 Offsets in the M20........................................................................................................................5