graph TD A[Receive MP3 URLs of instrumental and vocal stems, and tempo and beat position information] --> B{For each instrumental MP3 file} B --> C[Use skill #197 to extract 1, 2, 4, and 8 beat samples based on tempo and beat positions] C --> D[Output list of .wav file URLs for the extracted instrumental samples] B --> E{For each vocal MP3 file} E --> F[Use skill #197 to extract 1, 2, 4, and 8 beat samples based on tempo and beat positions] F --> G[Output list of .wav file URLs for the extracted vocal samples] D --> H[Combine all the extracted .wav file URLs into a single list] G --> H H --> I[Output the final list of .wav file URLs]