The Sound Blaster Clone sound cards, made by David E Larsson in Sweden, are replicas of the original Sound Blaster sound cards, with some improvements geared towards compatibility and sound quality. In this article, we take a closer look at the two available variants: ISA Sound Blaster Clone (for computers with 8-bit and 16-bit ISA BUS) and MCA Sound Blaster Clone (for computers with Micro Channel Architecture BUS).
ISA Sound Blaster Clone
Link to the store for purchase.
Technical Specifications
The Sound Blaster Clone ISA card reproduces the architecture of the original Sound Blaster V1.5 card based on the 8-bit ISA bus, while preserving its key features. It is also suitable for computers with 16-bit ISA slots. It also introduces improvements that extend its applications. Key technical specifications include:
- OPL2 chip (YM3812): FM sound generation, which is critical for audio support in games and applications of the 80s and 90s.
- Built-in DSP processor: Allows you to manage advanced sound effects, a distinctive feature of the Sound Blaster.
- Audio output mode: allows you to select between line level and amplified via jumper, adapting to different configurations.
- Built-in volume control: Specifically for amplified output, ideal for use with passive headphones.
- CD-ROM audio support: Includes internal connectors for routing audio from a CD-ROM drive.
- MIDI via joystick port: Compatibility with MIDI keyboards and other external devices.
- Microphone bias: Selectable power supply for active or passive microphones.
ISA Sound Blaster Clone Construction Details
The board is designed using modern SMD components, with primary chips, such as OPL2 and CMS, in the original version.
Applications and Features
This board is ideal for retrocomputing applications that require faithful reproduction of vintage audio. The presence of the amplified mode allows direct use with headphones, while MIDI support expands compatibility with musical instruments and external devices.
It is compatible with computers with 8-bit or 16-bit ISA slots, the card is accompanied by a plastic bracket (with metal option sold separately). Each unit undergoes rigorous testing to ensure full functionality.
MCA Sound Blaster Clone
Link to the store for purchase.
Technical Specifications
The Sound Blaster Clone MCA board is designed for the Micro Channel Architecture (MCA) bus, which is typical of many IBM PS/2 systems. Given the cost and rarity of the original cards for this bus, this replica represents an interesting technical solution. The main specifications are:
- OPL2 chip (YM3812): Support FM audio generation.
- Built-in DSP: management of sound effects, inheriting the functionality of the original Sound Blasters.
- Audio Outputs:
- 3.5mm jack for amplified output.
- Internal 4-pin line-level connector.
- Volume control: Dedicated adjustment for the amplified output.
- Internal and External Audio Inputs: Support for microphones and CD-ROMs with multiple pinouts documented on the board.
- Internal Audio Routing: Route audio to the system's built-in speaker.
MCA Sound Blaster Clone Construction Details
The board is built on a four-layer PCB with separation between ground and voltage planes to minimize electrical noise. All components are modern, except for the OPL2 chip, which is kept original to ensure sonic authenticity.
Distinctive Features
With support for internal audio via the MCA bus, this board allows you to use your PC's built-in speaker for sound playback, an option that can be configured through IBM's Programmable Option Select (POS) system. In addition, the higher amplified volume compared to historical MCA boards represents a significant technical improvement.
Applications and Compatibility
The MCA board is aimed at retrocomputing enthusiasts using IBM PS/2 systems with MCA buses, providing an optimized audio experience for these computers.
Here is the Unboxing...
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