TEAC IF-SM/DM IF-SM:DM Owner's Manual - Page 14

2 - Using the card : MONITOR ALIGNMENT option MONITOR ALIGNMENT option This allows the setup of the surround speakers and levels. Figure 2.21: MONITOR ALIGNMENT option screen Trimming the levels When monitoring in surround mode, it is important that the perceived level of each channel (as perceived from the monitoring position) is equal, in order to achieve a satisfactory mix. NOTE Before proceeding further with these operations, it is important that you ensure that the input mode of the card reflects the setup you are using and the output channels so that the channels correspond to the actual channels that you have set up in your system (if the channel meant to be driving the LFE is actually driving one of the surround 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 calibrate your monitoring system for optimal results. You will also need an SPL (sound pressure level) meter. Absolute accuracy in this case is not of prime importance-relative levels are what are being set up here. There are two standard weightings that are commonly used, and may be selected from most SPL meters: the "C" weighting, providing an almost uniform response from 32Hz to 10kHz, and the "A" weighting, which is concentrated on the 500Hz to 10kHz range. For full-range music productions, use the "C" weighting. TIP When you make the measurements described here, either stand the SPL meter on a tripod (ideal), or hold it to one side of your body, to avoid reflections, etc. caused by your body which can affect the final results. 14 TASCAM IF-SM/DM Owner's Manual