Aphex Systems 1788a instruction manual Hardware Hook-up, Control Assertion

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2.2.1 Hardware Hook-up

Anything from a single 1788A to a large constellation can be controlled by indirect MIDI through 1788A-R’s. Figure 2-5 suggests how this is done. The controller’s MIDI OUT is connected to the first 1788A-R’s MIDI IN. The next 1788A-R’s MIDI IN is connected to the preceding MIDI THRU, and so on.

2.2.2 Control Assertion

Depending on your needs, there are two control assertions available to MIDI:

1.Parametric control of any mic channel across the constellation.

2.Recall of one of the 60 presets that are stored in the 1788A-R’s memory.

In case 1, you will send one SysEx packet from the MIDI controller. The 1788A-R will then redirect commands across the LAN according to Net Number within its Bank. Additional 1788A-R’s can be cascaded by using MIDI Thru looping to control more banks. In the second case, the MIDI Preset Recall commands are shorter, containing only 2 bytes. The following figure illustrates the composition of the parametric and recall strings.

Fig. 2-6. Two Kinds of Remote Control Assertion

SysEx Start

Aphex MIDI I.D.

1788A-RMIDI Channel

 

 

 

xx

 

F0

00 00 38

 

 

 

 

(00 to 0F)* Offset by -1 from 1788A-R Channel Number

(00-0F) Any Number Works.

(00 to 0F)* Offset by -1 from 1788A Net Number

See Command Table

Mic Channel (01-08)

See Command Table

*See hexadecimal conversion table.

OnlyPlaceholder

1788ANumberNet

Command

ChannelMic

Value

EndSysEx

SysEx Parametric

Control String

00 xx xx xx xx F7

MIDI Preset

Code

Number

Command

Preset

 

 

 

Cx

xx

Range C0 to CF (C0 added to 1788A-R Channel Number -1)

Range 01 to 3C.

Hex Value of Preset Number (0-60).

The MIDI Preset Call omits the SysEx beginning and ending bytes. When a byte starting with “C” is seen by the 1788A-R, it recognizes the preset command. The MIDI channel I.D. is inferred from the first byte value Cx where x is the channel number 0h to Fh (1 to 16).

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Contents Manual Contents R/C Interfaces R/C Interface ConnectorsC Overview Control Language Midi SysExConcept of Banks & Constellations Indirect Midi ControlEthernet LAN Hardware R/C Computer R/CWide System View Preset ManagementAbout Presets Massive Grouping & ControlConstellation and Bank Capture/Recall Software PresetsManagement Extents Hardware RecallWRAP-UP Direct Midi Control Using MidiProcedure for Setting The Numbers Determining Channel & Device Numbers Channel & DeviceSetting Up The Controller Understanding Ch, Dev and Net OffsetsConnections Controlling Multiple 1788A’sLimitation Broad Commands & PresetsLearning a Preset Indirect Midi Control Indirect Midi Control ExamplesHardware Hook-up Control Assertion4 1788A-R’s Odd Midi I.D Preset Recall StrategyExpanding the SysEx String Daisy-Chained 1788A-R’sSynchronizing Procedure Multiple Midi ControllersReference Data Parametric Codes & ValuesUseful Conversion Tables General Hexadecimal Conversion TableSysEx F0 00 00 38 01 00 00 05 04 01 F7 Example Midi Control ExamplesSysEx F0 00 00 38 00 00 00 00 01 2D F7 Example SysEx F0 00 00 38 01 00 01 00 01 2D F7 ExampleIt’s easier to it see this way SummaryFront Panel Controls 1788A-R Hadrware RemotePurpose Clip/Limit LED’s Status LED’sComm LED’s Changing the Holdover TimeSecondary Functions Test Tone ButtonsPutting Up a Test Tone Taking Control Preset Manager PanelControl/Display Panel SnapshotsHow to Take a Live Snapshot Mismatch ErrorsEdit Mode EditingEscaping From Edits How to EditEditing Tools Bank Selector Power Unit1 I/O Located Here Midi JacksInstallation Assigning a Bank More about Using the 1788A-RSetting Up The Midi Channel Initial SyncCoexisting with a Software R/C Multiple Select Group BehaviorStandard Parts Hubs & SwitchesBuilding a Proper Network Networking SpeedRouter As Dhcp Server Only Typical Network Diagrams Router as BaseSuitable Hardware

1788a specifications

Aphex Systems 1788A is a high-performance microphone preamp and A/D converter known for its exceptional sound quality and versatility. This device is widely used in professional recording studios, broadcast facilities, and live sound applications, catering to a range of audio needs from vocals to instruments.

One of the key features of the 1788A is its ability to handle a wide variety of microphone types, including dynamic, condenser, and ribbon microphones. It provides a significant amount of gain, with a range of up to 70dB, allowing it to capture even the faintest of sounds without introducing noise. The flexibility of input options is enhanced by phantom power, which can be activated for condenser mics needing external power.

The Aphex 1788A also integrates advanced A/D conversion technology, providing high-resolution 24-bit audio with sample rates up to 192 kHz. This ensures that audio fidelity is maintained during the recording process. The unit features a dual-path A/D converter, which optimizes the signal for clarity and precision.

The device also incorporates Aphex’s innovative iEqualization processing, allowing users to enhance their recordings with EQ capabilities in real time. The iEqualization feature is particularly beneficial for adjusting the tonal characteristics of the source material, providing a more polished final product.

Another standout characteristic of the Aphex 1788A is its robust build quality. Designed for the rigors of professional use, the unit is housed in a rugged chassis that can withstand the demands of mobile and studio environments alike.

Transporting this device is made easier due to its rack-mountable design, fitting seamlessly into any standard 19-inch rack setup. Additionally, users appreciate the intuitive front-panel controls that facilitate easy adjustments and monitoring of levels.

In terms of connectivity, the 1788A offers multiple outputs, including analog XLR and digital outputs via AES/EBU and S/PDIF connections, making it highly compatible with various audio interfaces and recording systems.

Overall, the Aphex Systems 1788A is a powerful tool that combines exceptional preamp performance with high-quality A/D conversion, making it an ideal choice for audio professionals seeking reliability and superior sound quality in their recordings. Its comprehensive feature set ensures it meets the demands of both studio and live environments, solidifying its reputation as a trusted piece of audio equipment.
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