Although I don't own any of the Models, let me see if I can help break this down into something somewhat easy to understand.
If you have a Model 12 you have:
- A digital 10 track multi-track recorder/reproducer (1~10)
- A digital 2-Track mastering recorder/reproducer (11/12)
The Model 12 operates 100% in the digital domain. It has "Live" mixer capability; Multi-track Recorder capability; 2-Track Master Recorder capability; and can also perform as a digital control surface for a D.A.W. program for interface, recording and playback via a D.A.W.
The Models 16 and 24 operate in the analog domain. With the Models 16 and 24, you also have:
- A digital 14 or 22 Track multi-track recorder/reproducer (1~14 and 1~22 respectively)
- A digital 2-Track mastering recorder/reproducer (15/16 and 23/24 respectively)
The Models 16 and 24 have "Live" mixer capability; Multi-track Recorder capability; 2-Track Master Recorder capability. When connected via USB to a computer/D.A.W., the Model 16/24 when set to "PC" can record to/playback from a D.A.W. rather than the internal MTR. However, the Model 16/24 cannot act as a control surface for the D.A.W.
As far as I can tell:
- All three use WAV file format for their tracks.
- All three have a Display Menu option that permits the proprietary 2-Track stereo master WAV files (Tracks 11/12; 15/16; 23/24 respectively) to be exported as a standard integrated stereo WAV file.
- All three require using a D.A.W. for editing prior to mastering. They have no on-board editing capability.
- All three can use a D.A.W. as an external multi-track recorder/reproducer, with the added benefit of the D.A.W.'s full editing and sound manipulation capabilities in addition to the sound manipulation capabilites available on the Model 12/16/24.
There's a
Sweetwater video that demonstrates the most efficient and effective way to make use of the Models in a studio setting, IMO. There's also a video in this forum's sticky that demonstrates how the Model 12 acts as a control surface for various D.A.W. programs. As I recall, the Model 12 can only control 8 tracks at a time in the D.A.W.
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The following is from the Model 24 OM (Nov 2019). The features are the same for the other two Models, although the page numbers may differ.
Italics/Blue are the words found in the OM current as of November 2019 v#042862302. Text in black is my comments, as best I can decipher the OM. If you stitch together the scattered sections of the OM, you get :
OM page 37: Recording; and the Block Diagram on Page 160
REC buttons (1-12, 13/14-19/20, 21/22) select the channels to record to the SD card
[i.e., when a Channel is set to "Live", PC, or MTR MODE and the Channel REC button is activated, and when the Transport REC button is pressed, a stereo mix of up to 22 channels will be recorded on the MAIN MIX L/R bus MTR Tracks 23/24 - the 2-Track recorder/reproducer. As described below, if the MTR MODE is selected, the Channel input source also will be recorded to the associated MTR track. The Block Diagram suggests it's necessary to engage the Channel MAIN switch to get the signal to the MAIN MIX L/R bus and thence to the SD card].
When a MODE switch is set to “MTR” [Channels 1~22], the signal from the input jack on that channel will be recorded [to the associated MTR Tracks (1~22) if the channel REC button is activated and the Transport REC button is activated. A stereo mix of up to 22 channels will be recorded simultaneously on the MAIN MIX L/R bus MTR Tracks 23/24 whenever the transport REC button is engaged. The Block Diagram suggests it's necessary to engage the Channel MAIN switch to get the signal to the MAIN MIX L/R bus and thence to the SD card.]
The MAIN MIX L/R bus does not have a REC button...it is always in recording standby. The signals of the MAIN MIX L/R bus [whether "Live", PC, or MTR] will always be recorded [on MAIN MIX L/R bus MTR Tracks 23/24] when the Transport REC button is pressed.
[The Block Diagram suggests it's necessary to engage the Channel MAIN switch to get the signal to the MAIN MIX L/R bus and thence to the SD card]
.
OM page 32: Managing Songs
For one song, WAV files are saved for 22 [MTR] tracks and a stereo master file [MAIN MIX L/R bus MTR Tracks 23/24 ]...Songs [and the related WAV files] are created/saved in the MTR folder on the SD card.
OM page 24: SD MAIN MIX RETURN switch
When this switch is on (pushed in), playback of the stereo master file recorded on the SD card [i.e., recorded onto MAIN MIX L/R bus MTR Tracks 23/24 in the MTR folder] is output from the MAIN OUTPUT and AUX OUTPUT MON 1/2 jacks. When this switch is on (pushed in), the sound of the MAIN MIX L/R bus is not output.
OM page 44 Stereo Mix Export
MAIN MIX L/R bus files [MAIN MIX L/R bus MTR Tracks 23/24] can be converted to a single stereo [WAV] file. Converted stereo [WAV] files are saved in the MUSIC folder.
OM page 48: Playing [previously recorded] WAV files (SD PLAY mode)
WAV files [placed] in the MUSIC folder on an SD card can be played back...Playback signal is sent from channels 21 and 22 [the Bluetooth interface channels].