Commit a8bb196

@@ -0,0 +1,63 @@
+### FFMPEG Command used in processing function
+
+``` ffmpeg -i inputFile -ar SAMPLE_RATE -f s16le -ac 1 - ```
+- -i input.wav: Takes your input audio file
+- -ar 48000: Converts the audio to 48000 Hz sampling rate (48kHz)
+- -f s16le: Outputs the audio as 16-bit signed integers (raw audio data)
+- -ac 1: Converts to mono (single channel) audio
+- The final - means "output to stdout" instead of a file
+
+
+```ffmpeg -y -f s16le -ar SAMPLE_RATE -ac 1 -i - outputFile```
+- -y: Overwrites output file if it exists
+- -f s16le: Tells FFmpeg the input is 16-bit signed integers
+- -ar 48000: Sets the sampling rate to 48kHz
+- -ac 1: Specifies mono audio
+- -i -: Reads from stdin
+
+### WAV File Header Structure
+
+```wl
+Offset  Size  Field         Description
+---------------------------------------
+0       4     chunkID       "RIFF"
+4       4     chunkSize     File size minus 8 bytes
+8       4     format        "WAVE"
+12      4     subchunk1ID   "fmt "
+16      4     subchunk1Size Size of format chunk (16 for PCM)
+20      2     audioFormat   Audio format (1 for PCM)
+22      2     numChannels   Number of channels
+24      4     sampleRate    Sampling rate (e.g., 44100)
+28      4     byteRate      Bytes per second
+32      2     blockAlign    Bytes per sample frame
+34      2     bitsPerSample Bits per sample
+36      4     subchunk2ID   "data"
+40      4     subchunk2Size Size of audio data
+44      -     Audio Data    Actual audio samples
+```
+
+### Linear Interpolation
+
+This is a method of estimating values between two known values assuming a linear relationship between the two. The formula is:
+
+```plaintext
+x1 - x0     x - x0
+───────  =  ──────
+y1 - y0     y - y0
+```
+
+where (x0, y0) and (x1, y1) are known values, and (x, y) are the values to be estimated.
+
+**Resampling in Audio using Linear Interpolation**
+
+Since the x range will be constantly increasing by 1, we can simplify the formula to:
+
+```plaintext
+y = y0 + (y1 - y0) * (x - x0)
+```
+
+where `frac = x - x0`:
+
+```plaintext
+y = y0 + (y1 - y0) * frac
+```
\ No newline at end of file