Analog Outputs

The line level outputs of the M-1620 Pro operate at +13 dBu, +19 dBu, or +24 dBu. Each individual channel has its own line level setting, which can be adjusted remotely. Additionally, channels can be muted globally or individually.

In its default state, no routing exists between the digital inputs and the analog outputs. Each group of four consecutive outputs can receive its signal from any digital input that is connected and synchronized.

At all sample rates, the converters operate with short delay IIR filters. At single speed, a short delay 'sharp' filter is used to ensure linear frequency response. At double and quad speed, a short delay 'slow' filter is used to optimize the transient response of the M-1620 Pro while maintaining linear frequency response in the audible range. The filters can be changed in the State menu.

Adjusting the Output Line Level

To adjust the output line level:

  1. Open the Analog Output Configuration tab in the OUTPUT section.

    w162 310 2T 1

  2. Initially, the cursor will highlight all output channels. To accept this, rotate the encoder to move the cursor to the current reference level.

  3. Alternatively, pressing the encoder on the channel strip allows the selection of an individual channel.

    w162 310 2T 2

    wAL co 1

    Cursor (current channel)

    wAL co 2

    Output Reference Level

  4. Move the cursor to the current line level and push it.

  5. Rotate the encoder to change the setting and confirm by pushing the encoder again.

To adjust the output line level on the web remote:

  1. Select an analog output channel by clicking the corresponding channel strip. The channel strip turns blue.

  2. (optional) Click and drag left or right to select multiple channels.

    wAL 310 2T 3

  3. Press one of the buttons for +13 dBu, +19 dBu or +24 dBu below the selection. The selected value is shown within the level meter.

Mute Analog Outputs

To mute an individual output channel on the device:

  1. Open the Analog Output Configuration tab in the OUTPUT section

    wAL 310 3T 1

  2. Initially, the cursor will highlight all output channels. Press the encoder, then rotate the encoder to move the cursor to the channel that should be muted.

    w162 310 3T 2

    wAL co 1

    Cursor (current channel)

    wAL co 2

    Channel Mute

  3. Move the cursor to Mute Toggle and push it.

To mute an output channel using the web remote:

  1. Select an analog output channel by clicking the corresponding channel strip. The channel strip turns blue.

  2. (optional) Click and drag left or right to select multiple channels.

    wAL 310 2T 3

  3. Toggle the Mute switch. The status is reflected with a red M in the corresponding level meters.

Phones Out

The front TRS connectors can be used for phones or as balanced mono outputs. Each of the four channels can receive a signal from any connected digital or analog source. A button next to each headphone jack gives access to all features of the output.

Adjusting the Headphone Volume

The volume of the unbalanced phone outputs can be adjusted separately or as a stereo pair.

To adjust the headphone volume on the device:

  1. Press the PH 1/2 or PH 3/4 Button next to the corresponding headphone output.

  2. Rotate the encoder to adjust the gain.

    w162 311 3T 1
wAL 311 3T 4
To adjust the phones output level:

  1. Open the corresponding output channel strip.

  2. Use the encoder to adjust the gain in the 'PHONES' channel strip.

Press the Shift key while dragging the knob for finer adjustments.
Clicking twice on the encoder knob opens a text field that can be used to input a value using the keyboard.
To separate the left and right headphone channels:

  1. Press the Button labeled "Stereo". The button turns grey and a second channel strip opens with its own gain control.

Press the "Stereo" button again to create a stereo channel.

Any previously created gain offset between left and right channel will be ignored when joining the channels to a stereo group.

In addition, the overall output level can be adjusted between +4 and +19 dBu for each phones output (+10 dBu and +25 dBu in balanced mode)

Muting the Phones Output

To mute the phones output:

  1. Press the PH 1/2 or PH 3/4 button next to the corresponding phones output.

  2. Confirm the current output gain by pressing the encoder once.

  3. Turn the encoder to highlight the MUTE button.

    w162 311 4T 1

  4. Press the mute button. It turns red to symbolize that the phones are muted.

wAL 311 4T 2
To mute the phones output using the web remote:

  1. Press the mute button in the Phones output channel.

Using Phones Out as a Balanced Line Output

The headphone output can operate as a mono balanced line level output. This may for example be useful when an active talkback speaker with symmetrical input is connected to the 12Mic.

To activate balanced output mode on the device:

  1. Press the PH 1/2 or PH 3/4button to access phones output settings.

  2. Confirm the current gain by pressing the encoder, then turn the encoder to navigate to "Mode".

  3. Push and turn the encoder to activate "balanced", push again to confirm. The channel that was routed to the left phones output will now be applied to both tip and ring of a TRS connector, the phase being inverted on the ring.

To toggle balanced output mode using the web remote:

  1. Open the phones output channel.

    wAL 311 5T 2

  2. Press the BAL button to switch the channel to balanced out. The channel that was routed to the left phones output will now be applied to both tip and ring of a TRS connector, the phase being inverted on the ring.