The BitmapSequencer is a sound synthesis tool that uses bitmap images as audio wave-data.
The sequencer consists of a multichannel stepsequencer (16 beat cycles) in which you can place bitmap bsimages to create sounds. Each image will generate it's own unique sound as the audio is produced directly from the image data. You can control aspects of the sound such as pitch, panning, amplitude, as well as saving and loading tracks. BitmapSequencer was created for lovebytes 2003 and is available on cd rom.
The software may also appear as a download some time in the future.
There a several versions of the application you can use depending on the speed of your computer.
The usage of each part the program is covered in the following sections.
(A) Sequence Grid
This is the main area of the program, you can place bitmaps on this grid to create a sequence of sounds. There are a number of channels that will be played simultaneously. You can drag bitmaps from the palette(B) and modify the sounds using the menu items above(C). You can remove an image by pressing delete while the cell is selected. You can also copy(F5) and paste(F6) cells in this grid.(B) Bitmap Palette
This is a selection of bsimages available for you to use in the sequencer. You can drag an image from this line and drop it onto the main grid (holding down control allows you to paint with an image). You can load new bsimages into the palette by holding down the right mouse button over a bitmap, this causes a file list to appear from which you can select a new bitmap (any bitmaps on the grid that relate to this image will also be updated). New bitmaps should be stored in a folder called 'userbitmaps', new bsimages must be placed in this folder
In this section you can arrange stored patterns to create a song. The grid of letters represents which pattern should be loaded for the each channel at each bar. You can change the pattern for an entry by highlighting a letter with the mouse and pressing the key that relates to the pattern you require. The patterns are stored previously using the 'pattern' menu item on the toolbar(C). A small arrow above the song grid indicates the current bar being played. If the song is not paused this arrow will move across the song grid, loading in a set of patterns for each bar, when the pointer reaches the end of the song (100 bars) it will reset at bar 1. You can move the pointer about yourself by clicking above the song grid on bar you wish to move to (although patterns will not be loaded until the pointer moves to a new bar). NOTE: is is better to edit and store patterns while the song is paused (otherwise you may lose work as the pointer moves to the next pattern).Other details
You can add your own bitmaps to the program by using any graphics application. The bsimages must be 24bit .bmp files and be exactly 220*220 pixels (any other size will have unpredctable results), place new bsimages in the 'userbitmaps' folder. You can copy and use existing bmp files in this folder as a basis for new bsimages. Images need not be in greyscale, but at present only the red byte of rgb is used for audio (blue and green will not be synthesized). If you remove bmps from the 'userbitmaps' folder and then load a file that uses these bitmaps the program will report them missing and your patterns will be incomplete or corrupted. You can use the 'Esc' key to exit the program.