The R-88 8-Channel Recorder and Mixer by Roland is an 8-channel field recorder that is designed for recording and mixing in professional field-audio applications. In addition, it provides USB audio interfacing for use with DAW software. Ideal for field recordings that require multiple microphones, the R-88 provides simultaneous recording of 8 channels at a maximum sample rate of 96 kHz and will record 4 channels simultaneously at a sample rate of 192 kHz. It also conveniently renders a summed stereo reference mix as it records. The R-88 is capable of up to three hours of non-stop recording at 24-bit/96 kHz using a 32GB SDHC card, and up to ten hours at 16-bit/44.1 kHz. It provides 8 standard XLR mic inputs plus 2 digital inputs using the AES/EBU connection. Each analog input is equipped with 48V phantom power. The recorder also boasts 8 analog XLR outputs for connecting to other audio gear such as an analog mixing console. Digital output of the stereo bus is available via the AES/EBU output, while a stereo analog mix can be routed via the 3.5mm mini-jack output. Furthermore, there is a built-in slate mic on the R-88's front panel for recording quick memos. For slaving to video cameras or VTRs, the R-88 can be run in slave mode and will accept SMPTE time code via the SMPTE-in BNC connector. In addition, the R-88 can be the master, sending out time code to slave devices via the SMPTE-out BNC connector. The R-88 also acts as an 8-channel mixer for doing on-board mixes and is equipped with 3-band EQ on each channel. An integrated USB port enables it to function as an audio interface for recording when using a computer running DAW software. There is an additional USB memory port for quickly copying files to a USB flash drive. Channels8 channels + 2 channels (stereo mix from built-in mixer) (44.1, 48, 88.2 and 96 kHz), 4 channels (192kHz)Signal ProcessingAD Conversion: 24 bits, DA Conversion: 24 bitsData TypeFormat: BWF (mono/stereo), Sampling Frequency: 44.1/48/88.2/96/192 kHz, Bit Depth: 16/24 bitsRecording MediaSDHC Memory Card: 4 GB to 32 GB, SD Memory Card: 2 GBMixing ChannelsInput: 8 channels, Output: 2 channels (stereo)Channel Strip3-band equalizer, Fader, Panpot, Stereo channel linkMasterFader, LimiterIN 1-8 (Analog Inputs): XLR typeNominal Input Level:
Input Sens Knob: -62 (SENS +6dB parameter = ON), -56, -50, -44, -38, -32, -26, -20, -14, -8, -2, +4 dBu(Input Level Knob: 0)
Input Level Knob: Minus infinity to +8 dB
Maximum Input Level: +26 dBu
Input Impedance:
Mic Input (Input Sens Knob: -62 to -20 dBu): 4 KOhms
Line Input (Input Sens Knob: -14 to +4 dBu): 5.6 KOhmsOut 1-2 (Analog Outputs): XLR typeOutput Bus: Channel 1/2, 3/4, 5/6, 7/8 or Stereo mix from internal mixer
Output Level: +4 dBu/-60 dBu, Maximum Output Level: +24 dBu
Output Impedance: 600 OhmsOUT 3-8 (Analog Outputs): XLR typeOutput Bus: Channel 1/2, 3/4, 5/6, 7/8 or Stereo mix from internal mixer
Output Level: +4 dBu, Maximum Output Level: +24 dBu
Output Impedance: 600 ohms
When sampling rate is 192kHz, outputs 5-8 are inactive.MIX OUT (Analog Outputs)Stereo miniature phone type: 
Output Bus: Stereo mix from internal mixer
Maximum Output Level: 2Vrms/-30dBu
Output Impedance: 1 KOhmsDigital Input/Output: XLR typeAES/EBU, conforms to IEC 60958-4
Output Bus: Stereo mix from internal mixerHeadphones: Stereo 1/4 inch phone typeHeadphones: Stereo 1/4 inch phone type, Output Level: 80mW (32 Ohms)
Output Impedance: 10 OhmsBuilt-in SpeakerStereoPhantom Power48 +/- 4 V, 10 mA per 1 channel (8 channels of phantom power available simultaneously)Residual Noise LevelOUT 1-8: -80dBu (Input Level Knob: Min), MIX OUT: -90dBu (Input Level Knob: Min)Total Harmonic Distortion + Noise0.02 % or less (SENS Knob: +4 dBu, Input Level Knob: 0)Frequency Response20 Hz to 40 kHz (0 to -3 dB, Sampling Frequency: 96 kHz/192 kHz)Input EffectsLimiter, Low cut, Stereo channel linkMS microphone decoderFor REC, for play and monitorSlate Mic/ToneSlate Mic: Built-in, Slate Mic: 1 kHz, -20 dBFS/Alarm ToneMonitorPre Fader Listening (PFL), Real Time Analyzer (RTA)SB InterfaceA Type Connector (For USB Memory) supports USB 2.0 and 1.1 Mass Storage Device Class. 
B Type Connector (For Computer) supports USB 2.0 and 1.1 Mass Storage Device Class or USB Audio (Hi-Speed USB, 10 channels inputs and 8 channels outputs)
When sampling rate is 192kHz, the USB audio interface is inactive.SMPTE TimecodeBNC Connectors (Conforms to SMPTE 12M-1999)
Frame rates: 23.976, 24, 25, 29.97, 29.97D, 30, 30D
Modes: INT, RTC, REC-RUN, EXT SYNC, EXT (AUTO JAM), EXT SYNC REC, EXT REC
Clock Accuracy - Max Error Rate: 15ppmControl 1,2 jack1/4 inch TRS phone typeDisplay160 x 160 dots graphic display (touch screen)IndicatorsIN 1 to 8 Peak Indicators, Slate Mic Indicator, REC Indicator, Play IndicatorPower SupplyAC Adaptor (PSB-1U), Alkaline battery (AA, LR6) x 8, or Rechargeable Ni-MH battery (AA, HR6) x 8, External Power Supply: 4-pin XLR type (9 to 16 V)Recording TimeUsing 32GB SDHC memory card: 1ch: 100 hours (16 bits/44.1 kHz), 16 hours (24 bits/192 kHz)
4ch: 25 hours (16 bits/44.1 kHz), 3.8 hours (24 bits/192 kHz)
8ch: 12 hours (16 bits/44.1 kHz), 3.8 hours (24 bits/96 kHz)
10ch: 10 hours (16 bits/44.1 kHz), 3 hours(24 bits/96 kHz)Dimensions (W x D x H)10.25 x 9.31 x 3.68" / 260.35 x 236.47 x 93.47mmWeight5.88lbs / 2.67kg