I previously wrote an Amazon review of the main competition for the Edirol R-09 digital recorder, namely the m-Audio "Microtrack". In that review, I noted some serious reservations that I had with the Microtrack. Since that time, further experience with m-Audio and the Microtrack soured me on that company and that product, but Amazon does not allow a person to modify their reviews. I don't want to go in to the details here, but I will say that I decided the Microtrack was barely worth bothering with, and I ordered the Edirol R-09.
The R-09 is obviously targeted as a 'Microtrack killer', and in most ways Edirol has come through on all counts. In my limited experience with this very recently released product, I have yet to find any firmware bugs or disappointing functionality or performance (whereas my m-Audio's most recent firmware revision for the Microtrack, as of this writing, is still buggier than a bait shop, and shows no sign of really getting fixed properly).
The R-09 is for all practical purposes the same shirt-pocket size as the Microtrack. Where the MT used a very simple operator's interface, the R-09 instead uses something more like a conventional CD player/MP3 player/tape player interface that requires no user's manual to instantly feel comfortable with. You have the basic 4-way navigation pad that is either up/down/left/right or play-pause/stop/'rewind'/'fast forward', plus a central button that is either 'Enter' or 'Record'.
The R-09 has a tiny little LCD display, smaller than the MT, but it is superior in every way. It has all the information you caould ask for, very good level (VU) meters that actually work and respond well, elapses time, time remaining on memory card, track name, record/playback status, peak memory, special effect mode, etc. It is a monochrome LCD of high resolution and high contrast, with a bright (and adjustable) backlight. Although you need to hold the display close to your face to read it, once there everything is clear and legible.
To make sure that you know when the R-09 is recording, the Record button lights up with a large and bright red LED, and this can be seen from across the room. The LCD's level meters include peak indicatiors, but the R-09 also has a bright green LED above the keypad that lights when you have reached 0 headroom; this is handy when you are recording yourself, maybe in your own band or orchestra, and want to glance over to make sure the recording is OK....red light on, green light off, and all is well.
The R-09 takes two normal AA batteries, which can be alkalines or rechargeables. The R-09 will record or play for hours on a normal pair of batteries, and you can change them out any time. Compare this with the MT, which has a non-replaceable rechargeable battery inside; if it runs out during a session, you are in trouble, since m-Audio recommends against powered the MT from the charger while turned on. The R-09 has a menu selection for type of battery, and uses this information to properly estimate the remaining battery life for its display indicator. If you set this incorrectly, the unit will still work but the battery display will be inaccurate.
The R-09 has a decent set of mics built in, and the preamp has a Low/High selector switch that is accessible directly without going through the menu screen. This would be set to Low for most music recording, and High for capturing meetings and outdoor samples. The R-09 does not have balanced inputs like the MT, but has instead one mic and one line input jack, each using the common 1/8" diameter phone style connector. Via the menu, you can decide whether the mic jack supplies so-called 'plug-in-power' for the external mic. Many small stereo mics intended for camcorders and computers require the 'plug-in-power' to operate.
The R-09 does not have S/PDIF input or output (the MT has only input), but the intended market for this unit would most likely never use such a signal anyway. There is a single output jack, also and 1/8" stereo phone type, and it can be used for three purposes: headphones, line output, or digital output. I am not familiar with the protocol used for the digital output, but the manual suggests that some powered speakers, etc; use this type of plug and signal.
The R-09, like the MT, has a USB plug and a memory card slot. Unlike the MT, the R-09 hides these behind a sliding door on the bottom of the unit. The USB is capable of higher speeds than the USB on the MT, although you will still find it easier to remove the memory card and plug it into your computer's flash card reader for downloading.
The R-09 uses the 'SD' type flash memory card, as compared with the MT's use of the Compact Flash card. Both types are readily available and inexpensive. You can get a 2GB SD card for less than $50, and this will store 3 hours of 44.1kHz/16 bit PCM coded audio in WAV file format (i.e. CD quality).
For playback, the R-09 has a nice little digital reverb option with five choices: large hall, medium hall, room, plate, off. This works well and sounds quite good; a nice way to sweeten the recorded sound.
For recording, the R-09 has an automatic gain control (AGC) which quietly prevents clipping if the recording level is set too high for the music loudness. Normally you would not use this, and would turn it off, but sometime it can be a life saver. A big improvement of the R-09 over the MT is that the recording level can be turned all the way down to 0, meaning that both gain and attenuation are available as required by the input signal levels. One thing missing is that the R-09 cannot set the left and right channels to different levels, something the MT is able to do.
Setting the record level is down with a pair of up/down buttons on the left side of the R-09, rather like a cell phone volume control. The current setting is displayed on the LCD. Similarly, the playback level is adjusted with a pair of buttons on the right side of the unit. A minor annoyance is that the R-09 levels are set with a terranced/stepped internal circuit, which makes a very quiet click each time you ramp from one level to the next. This is useful, as you can hear the amount of change, but it is something you will hear in the recording. Best to set levels before starting the real recording, or use the AGC if you will not be able to set levels ahead of time.
For almost every application, I would recommend the R-09 over the competing Microtrack. I would only consider the MT now if I needed S/PDIF interface or the ability to set different left and right levels.