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Understanding ADPCM: Principles & Implementation ADPCM (Adaptive Differential Pulse Code Modulation) is an audio compression technique that focuses on encoding the difference between consecutive audio samples instead of their absolute values. By representing only the changes in audio data, ADPCM achieves significant data rate reductions. This project involves reading an audio file in blocks of 1024 samples, encoding it using ADPCM, and storing the ADPCM code in flash memory. Afterward, the ADPCM code will be retrieved from the flash memory, decoded, and the decompressed audio saved back to flash. Both the ADPCM code and the decompressed audio data will be written to the flash memory for analysis of audio quality. The flash memory has a capacity of 8 megabytes, and since the original uncompressed audio file is approximately 938 kilobytes, space will be allocated as follows: the original audio will be stored at the beginning of the flash memory, the ADPCM code will start at page 8192...

Echo Algorithm & Parameter Tuning The echo effect is a widely used audio processing technique that mimics sound reflections in different environments. Fundamentally, the echo algorithm works by capturing an audio input, introducing a delay to the signal, and blending it back with the original sound. This method requires fine-tuning parameters like delay time, feedback, and amplitude, enabling the generation of multiple repetitions that can differ in intensity and timing. Delay time specifies how long it takes for the echoed sound to return, while feedback determines the amount of the output signal that is redirected back into the input. The delay time is set to 300 milliseconds, determining the duration between the original signal and its echoed repetition. This value creates a noticeable gap that allows listeners to perceive the echo distinctly. The feedback level is configured to 0.7, which indicates that 70% of the output signal is fed back into the input.  Reading Audio Dat...