User manual OBERHEIM PROMMER

[. . . ] Oberheim Prommer MIDI Sampler/ PROM programmer USER'S GUIDE Prommer User's Guide 1 Table of Contents Prommer User's Guide 2 Table of Contents Oberheim Prommer User's Guide By Paul J. White Preliminary Edition, June 1986 CAUTION: To prevent fire or shock hazard, do not expose this appliance to rain or moisture. WARNING: This equipment generates and uses radio frequency energy and if not installed and used properly, i. e. , in strict accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever measures may be required to correct the interference. © 1986 - Oberheim - A division of ECC Development Corporation 11650 W. [. . . ] Press PARAMETERS again to return to examining memory. MODIFYING MEMORY In the absolute value and sign & magnitude display modes, you may modify the data that is currently displayed by using the number pad and the +/- button to enter a new value directly. Note: The protect status of a block is NOT checked before data is modified with this function. Prommer User's Guide 39 Block Functions Chapter 8 - SOUND MODIFICATIONS The Prommer has several sound modification features which change the data stored in memory. ENVELOPING A S O U N D One of these is the envelope function which will modulate the current block with a decay envelope. Suppose you have recorded a drum sound and there is a sudden cut-off of the sound at the end of the block. Press the ENVELOPE button to see the display: 2 ENVELOPE * Pressing the EXECUTE button now will modify the currrent block. However, you will probably want to set the envelope parameters before you go on. ENVELOPE DECAY P A R A M E T E R S Press the PARAMETERS button now to set the decay time: DECAY TIME= 3 3 Pressing the PARAMETERS button one more time will display the decay start point: START PT. = 0 / 1 0 0 The number pad and arrows may be used to change the envelope parameters. The decay of the envelope can be described as a linear decay from the specified start point to the end of the current block. The start point is specified as a fraction of the length of the current block - 0/100 means that the envelope will start at the beginning of the sound, 99/100 means that it will start almost at the end of the sound. A low value for the decay time will give a fast cutoff, and a high value will provide a long gradual envelope. Applying an envelope to a block two or more times increases the effect and makes the decay exponential rather than linear. HOW TO GET AN ATTACK E N V E L O P E In addition to a decay envelope, you can get the effect of an attack envelope in the following way: First reverse the block, then apply a decay envelope, and then reverse the block a second time. TECHNICAL NOTE ABOUT DECAY TIME For the technically inclined reader, the decay time can be defined as follows; D=decay time, X starts at 255. The current address is set to the start point and is incremented by one until it reaches the end of the block, while the linear equivalent value of the sound data at the current address is multiplied by X/256, and every D bytes, X is decremented by one (until it reaches zero). Prommer User's Guide 39 Sound Modifications PICTURE HERE : Figure 8 - Envelope example Prommer User's Guide 40 Sound Modifications MIXING SOUNDS IN MEMORY The sounds in two blocks may be mixed together into one block. Press the MIX BLOCKS button: 1 MIX WITH 2 * The current block is displayed at the left and the secondary block is shown at the right. Pressing EXECUTE now will mix the current block with the secondary block at the currently set mix ratio (see below) and store the result in the current block. MIX RATIO The two blocks can be mixed in equal parts, or a different mix ratio may be set. Press PARAMETERS to display the current mixing ratio: MIX RATIO= 3 / 4 Use the number pad or the arrows to change the ratio numerator. The numerator of the fraction (3 in this example) refers to the amount of the CURRENT block to mix and the denominator (4 in this example) refers to the amount of the SECONDARY block to mix. If you mix two blocks at a mix ratio of 0/4, the secondary block will be copied into the current block at half its original volume level. A mix ratio of 4/4 will mix equal parts of both blocks. RING MODULATION Press the MIX BLOCKS button again until you see the RING MOD. 2 The ring modulate function is like the MIX function except instead of summing two blocks together, the blocks are multiplied together and then scaled down, causing an effect known as Ring Modulation. [. . . ] Breach of any express or implied warranty, including the Implied Warranty of Merchantability, applicable to this product. Oberheim shall not be liable for damage or loss resulting from the negligent or intentional acts of the shipper or his contract affiliates. The owner of the product should contact the shipper for proper claims procedures in the event of damage or loss resulting from shipment. HOW TO OBTAIN WARRANTY SERVICE If you have reason to believe that your Oberheim product is malfunctioning or otherwise not operating properly, do the following: STEP 1: CONTACT YOUR NEAREST ECC / OBERHEIM SERVICE C E N T E R Telephone them as soon as the problem is discovered. Be prepared to discuss the problem as completely and accurately as possible. [. . . ]