A8 User Manual

A8 Firmware


IMPORTANT: Before installing new firmware, download the current manual. A new manual is posted for each firmware release and there can be many changes, including new firmware installation procedures. The front page of the manual states the firmware version that it covers. The manual may also be updated from time to time between firmware releases.


Current firmware:  3 August 2011

Change in firmware of 3 August 2011


For series 09 Realisers without HDMI (ID=C), prevents analogue audio input shutoff after pressing MENU-MODE. (MENU-MODE accesses the input selector menu, which is not a valid key sequence for Realisers without HDMI.)

Features and changes in firmware of 21 July 2011

The following are the most significant changes. Not all refinements are listed.

New features:

1. HDMI support.

2. Dual-user mode with independent PRIR, HPEQ, and head tracking.

3. Preset saving to SD card.

4. Automatic backup of all files to SD card.

5. Linear taper can be applied to PRIR with user-definable start and end points.

6. Microphone calibration and test procedure.

7. Optional password protection.

8. Headphone limiter threshold and release controls.

9. For optional meter bridge, phase meter adaptation rate control.


1. For presets, PRIR and HPEQ files are automatically saved to non-volatile memory when loaded, and preset erasures are also non-volatile. Parameters remain volatile until a preset is saved.

2. The toggle (on/off with same button) functions of the MIX and PASS keys have been dropped to prevent inadvertent re-switching by holding the key too long. The SVS key cancels MIX or PASS, as before.

3. In the ALL mode, a virtual centre speaker is generated automatically not only when only L and R speakers are selected for measurement, but also when any number of speakers is selected (omitting C).

4. When head tracking is disabled (TD), the head angle is set to the PRIR look-centre angle.

5. The channel 7 and 8 outputs are driven when the tactile output is disabled.

6. Rev. 2.0 file format (PRIR20XX.SVS, HPEQ20XX.SVS), enabling future enhancements.

7. For the ONE mode, speaker delays all conform to the delay measured during the first sweep.

8. For the LsRs and LbRb modes, the fixed speaker delays are reduced to 8 ms (384 samples).


Hardware ID menu fixes occasional display line transposition and power up/down thumps in early Realisers.

Features and changes in firmware of 7 June 2010

The following are the most significant changes. Not all refinements are listed.

1. The ALL speaker measurement procedure now allows measurements of a speaker or speakers to be made separately in stages. This provides a completely flexible way to create multiple virtual speakers in different locations and with different channel assignments from lesser numbers of real speakers. As a result, a channel on/off screen appears at the end of every measurement sequence to specify which channels are to be saved. For the typical ALL procedure, the channels will be set the same as when the measurement sequence began, in which case one additional OK keystroke is required.

2. Direct mixing of bass (LFE and/or redirected bass) into the headphones is now possible. This is for situations where there is no real subwoofer to be measured, or where there is only an inferior subwoofer, or where the room has modes that make low frequency performance problematic.

3. The ONE, LsRs and LbRb speaker measurement procedures now allow subwoofer (or other) measurements to be added, so 5.1 and 7.1 are now possible in addition to 5.0 and 7.0, etc.

4. The ONE, LsRs and LbRb speaker measurement procedures now use the default channel assignments.

5. Virtual loudspeaker arrays assigned to the same channel can now be created from a single real speaker by using an option in the AVG LOOK C menu which allows multiple sweeps to run with pauses between sweeps. During the pauses, a speaker can be moved to different locations. The typical application is to generate multiple virtual subwoofers from a single real subwoofer.

6. Measurement processing has been refined to improve the capture of multiple speaker arrays.

7. The TE screen is no longer momentary; it remains until CANCEL is pressed.

8. Manual EQ now uses thirty-one uniform 500 Hz filter bands (except for the last band).

9. A CONTROL MENU has been added, allowing enable/disable of UART and USB wired remote controllers in addition to the IR remote.

10. The TE menu has been modified to accommodate wired head trackers.

11. For look angle adjustment of “looking centre” after measurement, the left and right speakers’ phantom centre image is now used instead of the centre speaker. Thus stereo and other PRIRs which contain no virtual centre speaker can be adjusted; and perceptual sensitivity is increased.

12. The HPEQ inverse EQ compression factor (XFACT) bands are now 0-5 kHz, 5-10 kHz, and 10-24 kHz.

13. The head tracker SCOPE default is now HOLD.

14. Channel assignment options now appear in SMPTE/default order, and the C, LsRs and LbRb measurement procedures use SMPTE/default channel assignments.

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