LambdaDrum CPC Drum Computer Demo - 4 Channels of 8 Bit PCM @ 16 kHz скачать в хорошем качестве

LambdaDrum CPC Drum Computer Demo - 4 Channels of 8 Bit PCM @ 16 kHz

Spent some more time optimizing the PCM playback capabilities of LambdaSpeak 3. By now I have 4 channels of high quality 8 Bit PCM. In this video, 16 kHz drum samples are being used. 16 kHz are a good compromise between size and quality. The samples are from the Boss DR 660 drum computer, and can be found online. Combined, these 10 samples are about 120 KBytes in size - a good fit for LambdaSpeak's 128 KBytes of PCM EEPROM sample memory! Some ome pre-processing needs to be applied to the samples before they can be used with LambdaSpeak - first I am using Audacity for PCM editing (cutting, fading, normalizing, ...), then the Switch Sound File Converter for conversion to 8Bit 16 kHz PCM, and finally a program to remove all file and PCM headers from the PCM files. The resulting PCM files are then put on a standard CPC DSK file and being uploaded into LambdaSpeak's EEPROM memory using a simple CPC BASIC program (a MC program would do the 120 KByte upload in a few seconds). The drum computer program shown here is a simple BASIC program - all the actual PCM playback is done by LambdaSpeak, not by the CPC. The CPC would be incabable of serving PCM of that quality over its databus (insufficient CPU band width and clock speed).