You can definitely insert an EQ into the DMMTT’s FX Loop and get the same lo cut feature that is present in the DXMB. You will need at least three components in order to make the low cut circuit: 1 potentiometer, 1 capacitor and 1 resistor. I recommend the following values:

0.1uF Capacitor
100k / Reverse LOG (Linear would also work) Potentiometer
470 ohm resistor

Connect one lead of the 0.1uF capacitor directly to the input jack of the EQ.
Connect the other lead of the capacitor to the output of the EQ.
Connect the 470 ohm resistor to the lead of the capacitor that is connected to the output.
Connect the other lead of the 470 resistor to the CW (clockwise) pin of the pot.
Connect the CCW pin of the pot to the GND connection of the input/output jacks of the EQ.
Connect the wiper of the pot to the grounded CCW pin of the pot.

In this set up, as you turn the knob clockwise, more low end will be cut. It will definitely work best with a reverse log potentiometer. The linear will work ok, but most of the filtering action will occur in the last 25% of CW rotation. If you can get a log pot, you could reverse the CW and CCW connections and make it so that turning the pot CCW will filter more of the low end.

Hitting RECORD a second is the same as giving it the MIDI START command. The first time you press RECORD, the 2880 puts itself into a Record Ready mode, this is when both the EXT CLOCK and RECORD LEDs blink rapidly. The second time you press RECORD the 2880 begins recording using the MIDI clock to set the tempo.

Normal operation on the 2880 when recording a NEW LOOP while syncing to MIDI Clock goes like this:

1. Connect your MIDI cable to the 2880’s MIDI IN port. Set up your master device to produce MIDI CLK, preferably all the time. I’ll assume that the device is producing MIDI clock all the time in the following steps.

2. Enable EXT CLOCK and optionally, though I highly recommend, also QUANTIZE mode. Both LEDs should be lit above their respective buttons.

3. At this point you can check if 2880 is receiving the MIDI Clock correctly by changing the tempo on the master device while looking at the blinking CLIX LEDs. A tempo of 300 will cause the LEDs to blink rapidly. A tempo of say 130 will give you a medium speed blink and a tempo of 50 will be a pretty slow blink. If you see the changes in the blinking LED speeds then the 2880 is correctly receiving MIDI clock.

4. Now to record a Loop: Press the NEW LOOP button, the RECORD LED will blink. Press the RECORD button, now both the RECORD and EXT CLOCK LEDs should be blinking. At this point the 2880 is in record ready mode and is waiting for the user to either press the RECORD button or to receive the PLAY command from the MIDI master; either will cause the 2880 to begin recording the new loop. If you have QUANTIZE on as well, it will go through some portion of the 4 beat count-in. The 4 beat count-in picks up where ever the master happens to be within a bar at the time you press RECORD.

5. When you want to finish recording the loop press PLAY, the 2880 will begin playing back whatever you recorded on Track 1 and also begin recording on Track 2. If Quantize is on it will either finish out the bar or truncate to the end of the previous bar.

6. In step 4, if there is no MIDI Clock present when you hit RECORD the second time to begin recording, the 2880 will default to the last known good MIDI clock tempo or if no MIDI clock tempo had ever been present, it will default to the last setting of the TEMPO slider before enabling EXT CLOCK.

Tbe Hum Debugger will only cut out noise that is related to 60 or 50 cycle hum from wall outlets. The noise in the DMM is a broadband white noise.

Do you only hear the noise when you play notes? The DMM has its own built-in noise suppression circuit and you really should only hear the white noise when you play notes and on each subsequent echo. If you are hearing white noise at all times then something may be wrong with your DMM, if you are only hearing the white noise when you play notes and on each subsequent echo then there may not be much more you can do. The Boss NS2 acts in a very similar fashion to the noise suppression in the DMM.