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2 – Using the card : DOWNMIX option

TASCAM IF-SM/DM Owner’s Manual

DOWNMIX option

Downmixing is the process of folding a sur-
round mix into a formats using fewer chan-
nels. This is done for the purpose of checking 
compatibility.

The patterns available depend on the source 
format currently in use:

Depending on the value picked here, the other 
values (that is, the amount by which the 

source busses are attenuated before they are 
folded into the target busses) may be changed.

Figure 2.5: Example downmix screen showing 

attenuation points

Attenuation 

In the on-screen display, the 

attenuation points are shown as inverted num-
bers.

At the bottom of the screen, the values of 
these points can be viewed and set using the 
cursor keys, dial, and 

ENTER

 key.

NOTE

Note that some busses may pass through more 
than one attenuator before reaching their desti-
nation.

Source 

pattern

Available downmix targets

6.1

5.1

2.1

Stereo

Mono

5.1

LRCS (rear phantom center)

LRCS (rear hard center)

2.1

Stereo

Mono

LRCS

LRCS (rear phantom center)

Stereo

Mono

Stereo

Mono

Summary of Contents for IF-SM/DM

Page 1: ...This appliance has a serial number Please record the model number and serial number and retain them for your records Model number Serial number IF SM DM Surround Monitor Card OWNER S MANUAL D00885000A...

Page 2: ...SM DM analog outputs 4 Figure 2 1 The main surround monitor screen 5 Figure 2 2 The OPERATION option 5 Figure 2 3 SHIFTed number keys used for channel control 5 Figure 2 4 ROUTING option screen 7 Figu...

Page 3: ...slot into which you will fit the interface card Keep the retaining screws in a safe place If you are installing more than one card we suggest that you start from the top slot slot 1 and work downwards...

Page 4: ...or the IF FW card which must be fit ted in slot 1 any other interface card may be fitted in any expansion slot Connections The D sub 25 pin connector allows the connec tion of up to eight balanced ana...

Page 5: ...ls Switching downmix on and off Switching alternative speakers on and off Routing the internal oscillator on and off Turning bass management on and off Instant downmix to a 2 1 setting Setting the mon...

Page 6: ...speakers connected to the LC and RC channels which are not used in the surround patterns This allows the use of a pair of large stereo speakers together with smaller surround mon itors without the nee...

Page 7: ...Individual busses Pairs of busses Digital inputs 1 or 2 2 TR analog inputs The TDIF signals 1 through 3 The ADAT signal The signal of any card in a slot other than the surround monitor card In LRCS 5...

Page 8: ...they are folded into the target busses may be changed Figure 2 5 Example downmix screen showing attenuation points Attenuation In the on screen display the attenuation points are shown as inverted num...

Page 9: ...default underscored C L R 0 1 5 3 4 5 6 LS RS L R 0 3 6 CS LC L R 3 6 9 L R C LFE LS RS CS LC RC L R C LFE LS RS LC RC mute mute 3 3 4 5 6 L R C LFE LS RS CS LC RC L R C LFE LS RS LC RC mute mute mute...

Page 10: ...n Source Target Values in dB default underscored LFE C 3 6 9 LFE L R 3 6 9 LS LS summed and attenuated 3 RS RS Source Target Values in dB default underscored LFE C 3 6 9 LFE L R 3 6 9 LS S summed RS S...

Page 11: ...rear hard speaker configuration where the LS S signal is assigned to the CS speaker of a 6 1 configura tion not shown above LRCS stereo In the LRCS to stereo downmix the attenuation values are Table...

Page 12: ...wn mix there are no parameters changeable attenuation values The left and right signals are summed and attenuated by 3dB Figure 2 18 Stereo to mono downmix Source Target Values in dB default underscor...

Page 13: ...ment There are three parameters 1 The amount of attenuation supplied to the LFE channel before bass management occurs either 5dB default or 10dB 2 The amount of attenuation applied to the surround LFE...

Page 14: ...ctually driving one of the sur round channels you will have severe problems Use the ROUTING option on page 7 for this Use the mixer s oscillator set up to supply pink noise to allow you to set up and...

Page 15: ...essary so that it matches the first Trim levels can be adjusted 9 9dB in 0 1dB steps 6 Repeat this process until the levels of all channels as measured by the SPL meter are within a few dB of each oth...

Page 16: ...arlier to set the level to the desired reference level 4 Route the oscillator pink noise at nominal level through the surround system all channels 5 Adjust the amplification system so that the SPL met...

Page 17: ...E LS RS LC RC L R C LFE LS RS LC RC MUTE SOLO L R C LFE LS RS LC RC DAC ANALOG Output Select TRIM Surround Level LFE Level SPL Reference Moniotr Level dB dB dB dBc dBc Dimmer ALT SPK to 2 1 Level Sect...

Page 18: ...oscillator to MONITOR OUTPUT 1 8 Level max Signal delay 1 5 ms Fs 48 0kHz LINE to MONITOR OUTPUT 1 8 0 75 ms Fs 96 0kHz Mixer internal oscillator to MONITOR OUTPUT 1 8 X talk 90 dB 1kHz Mixer internal...

Page 19: ...o L4Z 1Z8 Canada TEAC MEXICO S A De C V Phone 52 555 581 5500 www tascam com Campesinos No 184 Colonia Granjes Esmeralda Delegaacion Iztapalapa CP 09810 Mexico DF TEAC UK LIMITED Phone 44 1923 438880...

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