Tag: audio

Combines 480p HDMI output, Apple II and Mockingboard audio, and several video expansions on one FPGA-based card.

Human review confirmed that the vendor product page offered a current ordering path on 2026-07-15.

Adds Software Automatic Mouth speech synthesis hardware to an Apple II.

The assembled card was out of stock on 2026-07-24.

Converts digital RGBI into 15 kHz analog RGB and can break out a Commodore 128's 40-column S-Video and audio.

The maker lists the assembled board as out of stock and publishes no fabrication package. This is not a scan converter; the display must accept the source timing, normally about 15 kHz, or use a separate scaler. The maker's design history says the completed logic omits the valid intensity-only dark-gray color, which appears black. The board also passes 5 V to HD-15 pin 9; verify that the attached cable and display do not ground that pin.

Builds a compact x86 computer for late DOS and early Windows 98 with integrated audio, networking, modern storage, and legacy input support.

The official Batch 2 product page reported sold out on 2026-07-27. The public repository provides a build guide and design files. A Vortex86EX SOM and AGP graphics card are required and were sold separately; RetroDreams' exact SOM listing was also sold out.

Replaces a failed or missing Atari POKEY with an updateable FPGA module in the original DIP-40 socket.

The product exposed a login-or-register-to-buy path on 2026-07-27. Installation is solderless only when the computer already has a compatible DIP-40 POKEY socket. This is a functional FPGA replacement, not a transistor-level NMOS clone; the seller warns that software depending on undocumented analog behavior or exact electrical characteristics may behave differently. The built-in USB port allows future firmware updates.

Replaces the Z80 and upper 32 KB of DRAM in a ZX Spectrum 48K, Spectrum+, or Timex TC 2048 while adding AY sound.

The seller exposed a login-or-register-to-buy path for MAMLAS on 2026-07-27; its Z80SRAM predecessor is discontinued. MAMLAS installation is invasive: remove the original CPU and any socket, disable or remove the upper 32 KB DRAM, and solder the module directly at the CPU footprint with correct pin-1 orientation. The audio connector is not included, and a ZX Spectrum 48K heat sink may need to be bent for clearance. Do not install the module on top of its shipping or protective bottom socket. Used Z80SRAM boards should be treated as a distinct earlier revision and checked against their archived instructions.

Converts composite, S-Video, RGB, RGBI, and VGA-family retro signals to simultaneous digital and analog DVI-I output.

The European SCART and Japanese JP21 Revision B pages exposed login-or-register-to-buy paths on 2026-07-27. Never connect an EU SCART cable to the JP21 version: the seller says the different pinout can damage the device. The newest dated hardware announcement says units made since June 2025 have a larger OLED and USB-C power, but an older section still says Micro-USB. Human review found no package clarification, so confirm the connector, power requirement, and included USB items with the seller. A DVI-to-HDMI cable and source-system cables are sold separately. Medusa line-doubles when needed but does not change vertical refresh rate, so the destination display must accept the resulting 50 or 60 Hz signal and may blank briefly when the source changes resolution. Install only firmware matching the hardware revision.

Converts NTSC composite video and analog audio from an Apple II or Apple III to an HDMI display.

The adapter was in stock and backorderable for $45 on 2026-07-30. It was not tested or intended for PAL systems. Simultaneously connecting a CRT and this adapter requires a composite impedance-matched switch box or video may degrade or disappear. The package includes generic composite, HDMI, audio-adapter, and power cables, but not a computer-specific Commodore A/V cable.

A buildable C128 and IBM CGA digital-to-analog video adapter with RGBS, RGBHV, and Commodore A/V pass-through options.

The repository publishes KiCad sources, Gerbers, a BOM, and printable cases for revision 1.3. The maker tested RGBI, composite, S-Video, audio, and GBS-Control output; revision 1.3 corrects the earlier monochrome pass-through error. This is not a scan converter. Use a compatible 15 kHz path such as GBS-Control or a suitable SCART converter. Never connect the C128 A/V power input and the external barrel power input at the same time. The maker found an ordinary SCART-to-HDMI box unstable in one 80-column game while GBS-Control remained stable.