Audio Connections, Analog In/Out Connections

Audio Connections

All audio inputs and outputs (both analog and digital) connect to/from the MMR-8 using DB-25 connectors. The pin configuration used on the DB-25 analog audio connectors is identical to that used for Tascam DTRS format digital tape machines such as the DA-88. Two female DB-25 connectors are used for the analog connections, one for input and one for output, as labeled on the MMR back panel. A single female DB-25 carries all eight channels of AES/EBU digital input and output signals.

Analog In/Out Connections

All analog inputs and outputs use balanced signals designed to mate with standard 600-ohm devices using +4 dBu levels. Internal trim pots are available to set the exact input levels, as required to match external equipment, although the MMR-8 is factory set to a nominal +4 dBu in and out. The inputs can also be set for a nominal -10 dBu level for unbalanced consumer and semi-pro equipment signal levels.

Analog audio processing is done on two separate 20-bit Analog to Digital and Digital to Analog converter cards mounted within the MMR-8. These converters are mounted in a special shielded cage within the MMR and are attached via ribbon cable to a card (labeled A I/O) plugged into one of the system ISA bus slots on the PC motherboard. These A/D and D/A boards have their own power supply separate from the main PC power supply. Maximum load is 12.28 vrms.

Digital In/Out Connections

A single female DB-25 connector is used to provide four stereo digital inputs and four stereo digital outputs. Tascam DA-88 analog I/O cables can be adapted for use as Digital I/O cables by using 4 XLR gender adapters. Digital input 1 is the default reference track for the AES/EBU reference. This can be changed to use digital input 3, 5, or 7 from one of the other three digital input pairs using Setup Menu 600 (Dig In Ref Track).

NOTE: The digital clock signals coming from any external device connected to the AES/EBU inputs will force the MMR-8’s internal clock to try to lock to it when digital input is selected (Setup Menu 500). This can cause playback and record problems if the clock source is not accurate. If this occurs set that track to use the sample rate converter in Setup Menu 500 (Input Source).

Monitoring Connections

For monitoring at the MMR-8 there is a mono headphone jack on the front panel (compatible with stereo headphones of either low or high impedance). For studio Cue or remote monitoring there is a rear panel line level mono mini phone jack. It is an unbalanced output designed to be connected to external amplification.

The front panel headphone monitor jack is controlled by the LEVEL control located next to the jack on the front panel. Press the MON key and select the desired tracks using the Track Select keys to choose which of the MMR-8 tracks will be summed to appear at the headphone jack output. The rear panel jack is a pre-LEVEL control, so it is a fixed line level output (-10 dBu), and it always presents a summed output of the audio channels selected using the MON function on the front panel.

Tascam MMR-8 User’s Guide • Chapter 2 • Installation

MMR-8

MMR-8 specifications

The Tascam MMP-16 and MMR-8 are two innovative products designed to meet the specialized needs of audio professionals, offering advanced features and capabilities suitable for various recording and playback applications.

The Tascam MMP-16 is a versatile audio router and mixer that excels in different environments, from live sound to studio recording. One of its primary features is the 16-channel configuration, allowing for significant flexibility in signal routing. The MMP-16 supports multiple audio formats, including analog signals, making it adaptable to a wide range of setups. It boasts high-quality AD/DA conversion, delivering excellent audio fidelity and low latency performance.

Additionally, the MMP-16 is equipped with comprehensive digital processing capabilities, including EQ and dynamics processing on each channel. This makes it ideal for both mixing live performances and preparing recordings for post-production. The unit's user-friendly interface includes an intuitive display and physical controls that streamline operation, making it easy for both novice and experienced engineers to navigate.

On the other hand, the Tascam MMR-8 is a robust multi-track digital audio recorder that offers exceptional reliability for professionals who require high-quality audio capture. This 8-channel recorder shines in its ability to handle various digital audio formats, ensuring compatibility with different workflows. One standout feature of the MMR-8 is its solid-state recording technology, which enhances durability and reduces the risk of data loss, a crucial aspect in high-stakes recording environments.

The MMR-8 also provides comprehensive onboard monitoring options, allowing users to assess audio quality in real time. Its extensive connectivity options include digital and analog inputs and outputs, facilitating seamless integration with other studio equipment and live sound systems. The data management capabilities of the MMR-8 make it easy to organize and retrieve recordings, while its compact design ensures portability without compromising on performance.

Both the MMP-16 and MMR-8 showcase Tascam's commitment to innovation and quality in the audio industry. Their advanced features, coupled with solid build quality and ease of use, make them essential tools for audio professionals seeking reliable solutions for their recording and mixing needs. Whether utilized separately or in conjunction, these devices amplify creativity and enhance the overall audio production experience.