Scratch supports and MP3 (up to 320kbps). Standard converters often downsample to 128kbps. Extra quality preserves the original bitrate.
: ZIP compression is inherently lossless . Zipping or unzipping an SB3 file does not degrade the quality of the internal images, sounds, or code. zip to sb3 extra quality
An .sb3 file is a single file. It is a disguised ZIP archive. Rename any .sb3 to .zip , and you can open it to find: Scratch supports and MP3 (up to 320kbps)
When you do a naive conversion (e.g., extracting an existing SB3, re-zipping it with suboptimal settings, then renaming it back), you trigger the following quality issues: extracting an existing SB3
if sb3_output_path is None: sb3_output_path = zip_input_path.with_suffix('.sb3') else: sb3_output_path = Path(sb3_output_path)
