+nanochess Posted November 2 Share Posted November 2 Hi all! It is kind of hard to experiment manually with sound effect generation for the Colecovision and CVBasic. So I decided to repurpose my Intellivision sound editor (you can see it at https://forums.atariage.com/topic/320358-sound-effect-editor/) and use the bigger screen space available in the Colecovision. The method of work is showing a list of frequency/volume/note/volume, where each item in the list will be played for one video frame (if Speed is 1) or each tone over several frames (again controlled by Speed). This means you are editing only a single channel of audio (because you could have music playing in the background), and in the case of the SN76489 chip used in the Colecovision at the same time a noise channel. Adding more frequencies to the list is controlled by pressing 5, or removing the last item by pressing 6. You move over the list to edit frequencies (8 items are shown, but the window can move up and down if you have more, up to 20). To edit frequency press 1, the limit for SN76489 is 0-1023, where lower numbers are acute sounds. The volume is edited pressing 2 (0-15, 0 is silent, 15 is highest volume, 12 is reasonable). To edit the noise mode press 3 (values admitted are 0 for no change, or 8-15 for selecting the mode per the SN76489 datasheet). Also you need to press 4 in order to edit the noise volume (again 0. is silent, 15 is the highest volume) To play your sound just press 9, and to show the CVBasic source code press 0. Alternatively your sound can repeat endlessly while you work (toggle with 8), and you can edit the frame speed for frequencies pressing 7. As you can see the keypad reference stays on screen (something not possible on the Intellivision) Enjoy it! effect.bas effect.rom effect_msx.rom 9 Quote Link to comment https://forums.atariage.com/topic/374800-sound-effect-editor-for-sn76849-and-ay-3-8910-compatible-with-cvbasic/ Share on other sites More sharing options...
+nanochess Posted November 2 Author Share Posted November 2 I've added a video demostrating the capabilities Quote Link to comment https://forums.atariage.com/topic/374800-sound-effect-editor-for-sn76849-and-ay-3-8910-compatible-with-cvbasic/#findComment-5559360 Share on other sites More sharing options...
+nanochess Posted November 3 Author Share Posted November 3 Apart from the Colecovision version, I've added the effect_msx.rom for MSX computers. Quote Link to comment https://forums.atariage.com/topic/374800-sound-effect-editor-for-sn76849-and-ay-3-8910-compatible-with-cvbasic/#findComment-5559537 Share on other sites More sharing options...
Jess Ragan Posted November 3 Share Posted November 3 This could prove useful. Thanks! 1 Quote Link to comment https://forums.atariage.com/topic/374800-sound-effect-editor-for-sn76849-and-ay-3-8910-compatible-with-cvbasic/#findComment-5559550 Share on other sites More sharing options...
Captain Cozmos Posted November 3 Share Posted November 3 (edited) It would be a great help to the community if someone could write a dedicated music/sound editor for the SN76849 that would output the proper data to use in Colecovision Assembly. A windows executable that outputs a file xyz.asm Tony Cruise? Edited November 3 by Captain Cozmos Quote Link to comment https://forums.atariage.com/topic/374800-sound-effect-editor-for-sn76849-and-ay-3-8910-compatible-with-cvbasic/#findComment-5559905 Share on other sites More sharing options...
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