Next Step is to apply my recipe on all the cleaned up audio files.
#Process

Here is my recipe:
1. Equalizer: Apply equalizer as shown in the image.
(In audacity: Effect -> EQ and Filters -> Filter Curve EQ)

2. Normalize to -12 db (Effect -> Volume and Compression -> Normalize)

3. Compress (Effect -> Volume and Compression -> Compressor -> Preset & Settings -> Factory Presets -> Podcast/Radio )

4. Change Pitch from F to E by -2% (Effect -> Pitch and Tempo -> Change Pitch)

5. Reverb according to the above image (Effect -> Delay and Reverb -> Reverb)

6. Normalize again to -12 db

This makes a huge difference in audio quality.

Finally, i split the clips based on the powerpoint slides order and correspondence and export each split as a separate wav file.

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