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- INSTEDIT : An Instrument Bank File editor for Windows 3.0
- (C) 1991 by David Giller
-
- Instedit allows you to modify the parameters used to define an instrument using
- FM synthesis. You will be able to modify any instrument found in a BNK file.
- BNK files are files in a format created by Adlib Inc. for storing large numbers
- of instrument names and the parameters that define them. These files may be
- found on online services such as CompuServe, or the various privately-supported
- Bulletin-board systems around the world. The Save option is disable in this
- demo version so don't worry about wrecking your BNK files. The file BNK835.BNK
- is included with this release which contains most of the instruments you will
- need for playing ROL files.
-
-
- INSTEDIT Instructions:
-
- File Menu-
-
- New. This option would allow the user to create a new BNK file,
- which he/she could fill with newly-created instruments.
- Open... This opens a new bank file for editing.
- Save. This would save changes made to the current bank file, but
- is disabled for this demo version.
- Save As... This option would be used to save the current BNK file
- with a user-supplied file name.
- Exit. This quits the InstEdit demo.
- About... This selection shows information about the editor.
-
- Instrument menu-
- New. This option would create a new, blank instrument.
- Open... This option selects an instrument from those in the currently-
- selected bank file.
- Save. This option saves the current instrument back to the bank file,
- but does not save the bank file back to disk.
- Save As... This menu item would save the current instrument to the
- bank file with the given instrument name, but not save the bank file to disk.
-
- Controls-
-
- The InstEdit controls represent the various variables involved in the
- description of an instrument. An instrument is, in most cases, made up of two
- 'operators'. These operators interact with each other to form the sound that
- comes out of the sound board.
- The first operator, the carrier, is the basic form of the sound. it
- determines the volume, shape, etc. of the sound.
- The second operator is the modulator, which, in FM mode, modifies the
- characteristics of the carrier. In Additive Synthesis mode, the Carrier and
- the modulator are both played simultaneously and independantly. This is how
- older organs used to create sound, and there is limited usefulness of this
- mode.
- Percussive instruments are the exception to the rule of two operators
- per instrument. Except for the Bass Drum, the Percussive instruments (Tom,
- Cymbal, Snare, and Hi Hat) use only one operator: the Modulator. In these
- cases, the modulator modifies a wave generated by an internal noise generator.
- The controls are fairly easy to get used to. This file is no place
- for a lengthy discussion of acoustics, so only a couple of non-obvious notes
- will be made here.
- The Voice control differentiates between indended voices. Because the
- FM boards treat each of the percussive instruments differently, you must
- specify which instrument you intend to use. An instrument designed as a tom,
- for example, could not be used in the snare voice of the Visual Composer.
- Oddly enough, there seems to be little difference between the Melodic mode and
- the Bass Drum mode. Instruments created for the Melodic mode may be useable
- in the Bass Drum voice in many cases, and vice versa. You should experiment
- with this relationship a bit if you need this interchangeability of voices.
- The Feedback parameter is another area of confusion. If you are not
- familiar with the phenomenon of feedback, you can just play with this control
- and see the effects. When this control is turned up, a bit of the carrier
- signal is fed into the modulator, creating an effect similar to distortion on
- electric guitars.
- The Waveform controls affect the basic shape of the operators. These,
- too, should be played with to see their effects. A sine wave is the smoothest-
- sounding, while a pulse-sine is similar to a triangle wave.
- The Test Note bar controls the pitch of the notes generated by the
- Testing buttons on the lower right of the InstEdit window. The lower the
- number, the lower the note.
- There is also some confusion over the nomenclature of Vibrato and
- Tremolo. Vibrato is variation in volume, and Tremolo is variation in pitch.
-