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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 the purchase.
Technical Specifications
The ISA Sound Blaster Clone card reproduces the architecture of the original Sound Blaster tab V1.5 based on the 8 -bit isa bus, preserving its main features. It is also suitable for computers with 16 -bit isa slot. In addition, it introduces improvements that extend its applications. The main technical specifications include:
- Opl2 chip (YM3812): generation of FM sounds, fundamental for audio support in the 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.
- Integrated volume control: specific for the amplified output, ideal for use with passive headphones.
- Support for CD-ROM audio: includes internal connectors for audio routing from a CD-ROM player.
- 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 tab is ideal for retrocomputing applications that require faithful reproduction of vintage audio. The presence of the amplified mode allows direct use with headphones, while the MIDI support expands compatibility with musical instruments and external devices.
It is compatible with computers equipped with 8 -bit or 16 -bit ISA slot, the card is accompanied by a plastic bracket (with a metal option sold separately). Each unit is subjected to rigorous tests to ensure full functionality.
MCA Sound Blaster Clone
Link to the store for the 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: allows you to direct the audio to the integrated speaker of the system.
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
Thanks to the support for internal audio via the MCA bus, this card allows you to use the integrated speaker of the PC for sound reproduction, an option configurable via the IBM POST (Programmable Option Select) system. In addition, the volume amplified higher than the historic MCA cards represents a significant technical improvement.
Applications and Compatibility
The MCA card is aimed at retrocomputing enthusiasts that use IBM/2 IBM systems with MCA bus, offering an optimized audio experience for these computers.
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