User manual AKAI MFC42

[. . . ] Analog Filter Module WARNING!! To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture. 1-En CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. THE SYMBOLS ARE RULED BY UL STANDARDS (U. S. A. ) The lightning flash with arrowhead symbol , within an equilateral triangle, is intended to alert the user to the presence of uninsulated "dangerous voltage" within the product's enclosure; that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intented to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance. [. . . ] . Low Frequency High Low Frequency High [Pole] Determines the shape of cut-off curve. (1 pole = -6dB/Octave) Note: Up to 8-pole is available on Mono channel. Frequency Cutoff frequency 2POLE ( -12dB/oct ) 4POLE ( -24dB/oct ) 8POLE ( -48dB/oct ) Filter operation ( -3dB) Let's master the operation of MFC42, confirming how the sound changes when the signal goes through the filter, in the actual application. The following is based on the connection of rhythm machine (stereo connection), but the operation of the MFC42 is the same with other devices. <Preparation> (Connection to rhythm machine) Connect the stereo output of the rhythm machine to the STEREO IN connectors of the MFC42. Connect the OUTPUT L/R to your sound monitor system (or connect your headphones to the headphone jack, instead). While the MAIN VOLUME is turned down, turn on the rhythm machine, the MFC42 and then your monitor system in that order. (Level adjust) Adjust the level of MFC42 while playing the rhythm machine. Next, turn the MAIN VOLUME (or PHONES LEVEL for headphone) up to the appropriate level. (Panel settings) Turn the RESONANCE fully counterclockwise and the CUTOFF knob to 2 O'clock position, and set the FILTER TYPE switches to LOW PASS (both switches down) position. Now, we're all set to experiment. (Auto-tuning) As the characteristic of analog circuitry, the heat makes the filter cut-off operation unstable. With the built-in Auto-tuning function, it self-adjusts the internal filter circuit optimal. and CC NUMBER keys simultaneously to start it (bars on LED flash while autotuning). Perform this auto-tuning when the unit is warmed up. 8 Chapter 2 Basic Operation Changing the sound 1. Passing the filter First, pass the input signal through the filter on the Stereo channel. CUTOFF change The CUTOFF knob changes the character of sound fed through the filter. Try rotating the CUTOFF knob, paying attention to the character of sound. Now press 4 POLE and 2 POLE keys alternatively while rotating the CUTOFF knob to hear the difference by the number of poles. FILTER TYPE selection FILTER TYPE, as the name implies, the type of filters is selected here by the combination of toggle switch position. Depending on the filter type selected by the combination of these switches, the way the sound change differs when the CUTOFF knob is rotated. Try selecting the different filter types while rotating the CUTOFF knob. RESONANCE change The resonance effect gives the distinguish character of metallic sound. As the effect of RESONANCE changes largely on the position of CUTOFF knob, try changing the CUTOFF position when the effect of resonance is not so significant. Using the effects The MFC42 has the Phase Shifter and Distortion effects unit built-in. Hear how the sound changes with the various CUTOFF and FILTER TYPE settings. The amount of distortion is adjusted by the INPUT and/or LEVEL knobs on Mono/Stereo channele. [. . . ] When the Bass sound changes as it did in recording, the MFC42's data is properly recorded on the track16 (You may also check the recorded data in Step Edit mode). In the above example, only the operation of CUTOFF knob has been recorded, but operation of other keys and knobs can also be recorded as well. Recording the settings When the settings of MFC42 have been recorded (Send Scene function) at the beginning of sequence, it can be recalled when it's played back from the beginning of the song, even if the keys and knobs are operated in the middle of the song. Select the track to record data Since the tracks 1, 10 and 16 are already in use, select the track other than 1, 10 and 16. [. . . ]