456HD® Analogue Tape Simulation for both Recording
and Post Production

The 456HD® Analogue Dynamics Process is an innovative new way to experience modern dynamic and harmonic control in real time with zero latency. It was inspired by the desirable qualities of tape recording and can reproduce their dynamics and harmonic properties accurately plus improves the overall dynamic performance of Digital Recording. It brings a far more sophisticated approach to dynamic control and its performance exceeds that of any tape recorder previously produced now setting a new benchmark.

The 456HD® High speed analogue dynamic process can be switched In and Out to instantly hear the effect of the tape simulation properties. This proprietary process is based upon and derived from the properties of a perfectly lined up Studer A80 with 56 Tape without any of the problems associated with old mechanical tape recorders that were temperamental at the best of times and required dedicated in house technicians to maintain them daily at great expense.

Good quality 2 inch tape today has a cost (£250.00 for 15mins) and that is really not a viable financial option for the modern recording process with today's tight budgets.

The output level of the 456HD® process into a DAW can be adjusted by the TRIM control knob to simulate and control the over recording set ups that were used back in the day to push the tape into saturation with the correct desirable amount of sonic tape compression. Pushing the tape hard was an important tool in getting the correct thick musical sound for your tracks. You can rest easy and think of the 456HD® process as a solid state tape recorder being converted into digital by your DAW.

The 456HD® process has been in use for over 4 years by top producers and the RM 58 Classic Stereo Limiter has also been extensively field tested by some of the finest ears in the industry


Analogue Zero Latency Processing Advantages
before Recording into a DAW.

The enemy of obtaining ultimate fidelity when recording audio using any DAW is the ANTI-ALIASING filter which is 1st in the signal chain before the converter. It is absolutely necessary to allow the converter to work properly at all. So we cannot get around this fact technically. The CD format was introduced in the 1980's with today's current standard of 44.1KHz / 16bit and all were produced from analogue tape masters. These CD versions of many legendary vinyl recordings today are considered by many to be the Holy Grail and Benchmark for many music listeners and their quality and detail have yet to be surpassed. Of course all the mixing and production work was done in the analogue domain and the final mix masters were then converted A to D one time to produce the CD Masters.

This simple piece of factual History inspired me to develop the 456HD® process to bring a practical solution to an important part of the puzzle when recording into the modern digital world.

The properties of a tape recording were very important in the initial success of the CD. The pre-processing of the audio by the tape recording process actually helped minimise the nasty artefacts that the ANTI-ALIASING filter produces.

The mathematics of this steep step filter is beyond a short explanation. It can however be partially understood through a simply analogy that "once detail is lost it cannot be reconstructed" this holds true for audio as it does with visual images.

This problem under mathematical analysis proves that this type of filter introduces significant phase shifts of 5 or more complete high frequency waves. This is no small error and the information is now time shifted or smeared and is held by the filter to cause further errors so new information appearing will be corrupted.

These types of artefacts result in the "white noise" high end you can hear and the indistinct audio quality of mid- level program material. The tape recording process helps eliminate most of these by actually reducing the slope of the audio peaks whilst still retaining the fidelity of the power portion of the program material.

So it is obvious that analogue processing with zero latency before an A to D conversion is the preferred method. After all analogue information is continuous information and not a sampled digital representation of the original source. Modern digital audio products have evolved into a "fast food", "one size fits all" solution but "when your instinctive good taste when mixing and listening is not satisfied" please take time out and listen to our modern analogue alternative.

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