Source: MiniDisc Wiki contributors · September 3, 2026 snapshot · CC BY 4.0, except where otherwise credited.
Attribution and changes
Adapted from “Sharp MD-MS721”. Links, layout and file names normalized; missing database fields restored; remote embeds replaced with links. Manufacturer manuals and separately credited photographs retain their original attribution.
| Name | MD-MS721 |
|---|---|
| Manufacturer | Sharp |
| Released | 1998/09 |
| Device type | portable |
| Recorder | Recorder |
| MDLP | No |
| NetMD | No |
| Hi-MD | No |
| Radio | No |
| Dimensions | 87 x 25.9 x 81.5mm |
| Weight | 216g (w/ batt) |
| ATRAC ver | Sharp 6 |
| Battery | Not recorded AD-S31BT |
| Battery notes | Not recorded |
| Sidecar (depr) | 1xAA |
| Voltage | 3.6, 5 |
| Power cable | Not recorded |
| Price (launch) | Not recorded |
| ¥46 000 | |
| - | |
| Inputs | 3.5mm line in (optical multi), 3.5mm microphone |
| Outputs | 3.5mm headphone |
| Control | Not recorded |
Available in MD-MS721-S (Silver) and MD-MS721-A (Blue)
6th generation 24-bit Sharp ATRAC. (20-bit AD/DA converter)
Adopts two types of auto play functions for use outdoors and in the car.
- "Slot-in auto play" function that starts playback just by inserting a disc.
- When used in a car, after turning off the engine, when the engine is restarted, playback will start from the beginning of the previously listened track.
Microphone Synchro Function - Recording starts automatically in response to sound or voice. In addition, it senses silence for 3 seconds or more and pauses, so you can use the disc without wasting it.
Time auto mark function - can automatically record cue points at regular intervals (three-step switching of 3 minutes/5 minutes/10 minutes)
2x fast playback function
40 second sound skipping guard memory (16-megabit DRAM)
12% reduction in volume and thickness compared to the prior model ( MD-MS701) the motor unit for raising and lowering the recording head has been reduced to 2/3 the size of the previous model by adopting a new reduction gear mechanism. Achieving slimness and slimness (← that's in the press release)
Uses a "floating" charging system that allows charging even during recording or playback with an AC adapter
Katakana character input support
Designed to work with the Sharp AD-AJ2 PCMCIA laptop soundcard. See below for pics and drivers.
Content adapted from: Sharp Press Release Sharp Press Release (MiniDisc Wiki mirror) MiniDisc.org page
Manuals
MD-MS721/MD-MS722 Service Manual
Sharp AD-AJ2 drivers — unavailable in this snapshot
Repair
Photos
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Additional specifications and references
| Web Md | No (not NetMD) |
|---|---|
| Remote Page | |
| Atrac Ic | LR37811 / LR37811A (Sharp) |
| Manual | User manual |
| Region | Japan |