Orpheus II ISA Soundcard Returns for Pre-Order Due to Enthusiast Demand

The Orpheus II ISA soundcard has returned for pre-order due to strong demand from retro computing enthusiasts. Keropi and Marmes are offering the updated hardware in a green Rev 1.1 configuration that improves upon the original design. The card targets users running DOS or early Windows systems who require reliable legacy audio support.

Keropi and Marmes release updated hardware with green Rev 1.1 board targeting DOS users

The device functions as an ISA soundcard that supports multiple historical audio standards within a single expansion slot. It integrates the Crystal CS4237B codec for Sound Blaster Pro and WSS compatibility alongside the AMD InterWave chip for Gravis UltraSound PnP emulation. This dual-architecture approach allows the card to handle both FM synthesis and digital audio playback simultaneously.

Specifications

• Audio Codecs: Crystal CS4237B (SB Pro / WSS) + InterWave (GUS)
• FM Synthesis: Yamaha YMF262 OPL3 + YAC512 DAC
• GUS Compatibility: Full InterWave‑based GUS PnP implementation
• GUS RAM: Up to 16 MB (SIMM slot)
• MPU‑401PCMIDI: true Intelligent Mode

Key technical specifications include a Yamaha YMF262 OPL3 FM synthesizer paired with a YAC512 DAC for high-quality MIDI output. The system supports up to 16 MB of GUS RAM via an internal SIMM slot and features fully configurable IRQ and DMA settings for Sound Blaster, WSS, GUS, and MPU-401 protocols. Digital audio capabilities cover SB Pro 2.0 standards with 16-bit playback and recording.

The hardware includes external MIDI I/O connectivity and a standard 26-pin wavetable header compatible with DreamBlaster, SCB-55, and X2GS modules. Physical outputs consist of line-out, line-in, mic-in, and CD-in jacks alongside an S/PDIF digital output. The manufacturer emphasizes extremely low noise floors achieved through modern PCB design and a clean analog stage.

Pricing is set at €340 EUR including worldwide tracked airmail shipping. US residents must pay an additional $41 for UPS Express delivery. Pre-orders close on Sunday, May 31 with shipments expected to begin in late July or early August.

The Orpheus II builds upon the legacy of its predecessor by adding InterWave-based GUS PnP capabilities. Upgrading from the original Orpheus I is primarily beneficial for users who require the AMD Interwave chip features. The card includes a mixer utility and EEPROM configuration tools alongside high-quality filtering components.