Related Manuals for Oakley SRE330
Summary of Contents for Oakley SRE330
- Page 1 Oakley Sound Systems Stereo Ensemble – SRE330 User Manual V2.4 Tony Allgood Oakley Sound Systems CARLISLE United Kingdom...
- Page 2 Introduction This is the User Manual for the SRE330 Stereo Ensemble module from Oakley Sound. This document contains an overview of the unit and goes into some detail regarding the operation of the module. It also contains the calibration instructions.
- Page 3 The Oakley Sound SRE330 The Oakley SRE330 is a multi mode stereo ensemble unit designed to mimic the behaviour of the multichannel chorus and ensemble units of late 1970s and early 1980s. The SRE330 uses up to four channels of bucket brigade delay (BBD) lines and up to four voltage controlled low frequency oscillators (LFO) to achieve a sound reminiscent of various types of string machines, guitar chorus pedals and studio rack effects of yesteryear.
- Page 4 The unit is powered from a Yamaha PA-20 'line lump' type mains adapter. The SRE330 is an enhanced version of our now legacy SE330 half rack unit.
- Page 5 If the SRE330 were used to add a little stereo chorus to this sound it is effective to have all notes treated equally and let the chorus enhance the stereo imaging. The input mode can then be switched to MONO which removes the stereo information from the input before applying it to the chorus circuitry.
- Page 6 (the latter was called Dimension on some older panels). With the SRE330 set to MULTI there are up to four BBD channels in operation. Each side of the stereo signal has two dedicated BBDs and, like in the 3 PHASE mode, each BBD has its own driver circuitry which controls the delay imparted by that BBD.
-
Page 7: Dual Mode
STEREO Mode This is the simplest of the SRE330's three multi modes. Only two BBD lines are used in this mode, one for the left hand channel and one for the right. Each BBD produces a similar delay when not modulated so that the sound from both left and right is more or less the same. - Page 8 TRIANGLE RATE For use with MULTI mode only. This controls the rate of the triangle wave low frequency oscillator (LFO). An LFO produces an output signal that changes in voltage with a repeatable and periodic shape. The triangle wave output rises at a constant rate, reaches an apex and then descends at the same rate as it went up.
-
Page 9: Output Level
Input and Output Connections The SRE330 has both balanced input and output connections. It is expected that the unit will be fitted with three pole TRS (tip-ring-sleeve) sockets. Both input and output are compatible... - Page 10 Calibration There are eighteen trimmers on the SRE330. It will be useful to have access to an oscilloscope and a frequency counter for the complete calibration routine. All voltages should be measured with respect to a suitable 0V point. That is the black lead of your meter should be connected to 0V.
- Page 11 Set your scope's time base to 5uS per division and the scaling to 200mV per division. Turn the input level down on the SRE330 so that no signal is passing through the delay lines. We need to monitor the voltage at the input to the first low pass filter for each of the four BBD circuits.
- Page 12 S_LVL This sets the maximum output level of both sine wave LFOs. Set TYPE to MULTI, and the sine rate and depth pots to their maximum. Set your scope's time base to 5mS per division and the scaling to 2V per division. Then monitor the voltage on pin 1 of U25 and adjust S_LVL until you get a 10V peak to peak signal.
-
Page 13: Final Comments
Final Comments I hope you enjoy using the Oakley Sound SRE330. If you have any problems with the module, an excellent source of support is the Oakley Sound Forum at Muffwiggler.com. If you have a comment about this user manual, or have a found a mistake in it, then please do let me know either via e-mail or the forum.
Need help?
Do you have a question about the SRE330 and is the answer not in the manual?
Questions and answers