is there someone having 2812's UCOS SOURCE CODE?

Digital Signal Processing

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  • 1. Transposing Audio Samples in Real-Time
    Hi, I'm using a C program to output a set of audio samples to my sound card. The samples belong to a marimba I sampled and I have each note from 220 to 440Hz sampled. At the moment I have a buffer, which I can update in real time, which contains what note to play and at what time to play them. I can update this buffer in realtime. I have each of my samples stored in a seperate buffer, and I copy the relavent samples to the soundcard for each note. I'm now interested in generating microtonal notes also, in realtime. For example, lets say I wish to output the note "A3 + 20 Semitones" (222.56 Hz). To do this, I could resample the A3 note to shift it up in frequency before outputting it to the soundcard. So, how would I do this resampling? I'd prefer to use the simplist method available, but am also interested in other suggestions. I process a seconds worth of audio at a time. Thanks for your help, Barry.
  • 2. Advise to a shaker/accelerometer control system
    Hi, I'm absolutely new to control systems and would highly appreciate some good advises from some veterans or anyone who has something that could help me get going. Well, the task for me is this: Having a shaker (works exactly like a loadspeaker) and a DC accelerometer that must run in a digital control loop. Sample freq is 4000 Hz. Shaker is attached to the DAC through an amplifier (no filter). Accelerometer is attached to the ADC (no filter). the 3 dB frequency range for the system must be 0 - 100 Hz (e.g. the shaker must be able to follow a 30 Hz sinus). The control signal is digital and can be a deflection, velocity or acceleration signal depending on what is easiest or best to use. Where should I start? What sort of control system should I use? Thanks Ole
  • 3. audio input extension for ADSP-21369 EZ-Kit Lite
    Hi, I am developing audio applications on the ADSP-21369 EZ-Kit Lite board. The board has 8 channels audio output but only 2 channels input, although the DSP itself supports more channels. Now I am searching for a extension board for the EZ-Kit which provides 6 or more (analog) input channels. Is there anything like this availble? Regards, Arne Borsum

is there someone having 2812's UCOS SOURCE CODE?

Postby Wenhui Pan » Wed, 15 Dec 2004 19:29:33 GMT



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