With this free image converter, you can convert images to sid online. Optional settings can be provided to improve quality.
SID
.SID Music File (SID File)
What is the sid format? The SID file type is primarily associated with Commodore64 (C64). Note: audio/prs.sid is the official registered MIME type for this file type; audio/psid is the file type being considered for use by .SID files under BeOS. The file that starts with PSID is a PlaySID file while the RSID file is a RealSID file. The RSID format was designed to contain tunes that are not PlaySID compatible, but strictly require a real C64 environment to run.