https://github.com/maxim-zhao/sampletowav

Converts sampled audio data inside ROM files to a WAV file
https://github.com/maxim-zhao/sampletowav

rom-hacking sega-master-system

Last synced: about 1 year ago
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Converts sampled audio data inside ROM files to a WAV file

• Host: GitHub
• URL: https://github.com/maxim-zhao/sampletowav
• Owner: maxim-zhao
• Created: 2015-12-18T23:37:52.000Z (over 10 years ago)
• Default Branch: master
• Last Pushed: 2016-03-18T14:49:10.000Z (about 10 years ago)
• Last Synced: 2025-03-25T07:22:24.807Z (about 1 year ago)
• Topics: rom-hacking, sega-master-system
• Language: C#
• Homepage:
• Size: 21.5 KB
• Stars: 6
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# SampleToWav

Converts sampled audio data inside ROM files to a WAV file

This is a small program which allows you to convert data stored in binary files (initially targetting ROM images for Sega 8-bit home video game systems) into minimally-adjusted WAV representations of the same data.

![Screenshot](http://i.imgur.com/mAZhVHB.png)

This covers three aspects:

## Data extraction

Currently supported formats are:

* 4-bit SN76489 volume control data (stored in big-endian or little-endian order)

* 8-bit unsigned PCM data

* 1-bit [PDM](https://en.wikipedia.org/wiki/Pulse-density_modulation) data (stored in big-endian or little-endian order)

## Data conversion to linear PCM

Current adjustments are:

* Convert SN76489 volume control values (attenuation at 2dB per step) to linear PCM

* Pass-through (treat source data as linear PCM)

* 8-bit data truncation to SN76489 volume control values (to match operation of some sample players)

## Output conversion to WAV

Output formats are:

* 8-bit unsigned

* 16-bit signed

* 32-bit float

The sampling rate is entirely under the control of the user, subject to the WAV format's limitation of integer Hz values.