![]() The large knob is the only operational control on the device, and operates as a shaft encoder as well as a push switch. ![]() The device is wedge‑shaped, with a backlit 64x128 pixel supertwist LCD panel angled towards the user. A rackmounting version will be launched shortly but all versions employ exactly the same electronics and software. ![]() The standard Audio Toolbox is a large handheld unit measuring about 140mm wide by 235mm deep and weighing 700 grams in its plastic case (without the external battery unit) a ruggedised all‑metal alternative is also available. Now with Mark II hardware in three alternative forms and Version 2 software, the Audio Toolbox is a very powerful and cost‑effective system. That is exactly what American company Terrasonde have come up with in their DSP‑based 'Audio Toolbox' - a comprehensive analogue audio test and measurement set. Nevertheless, an affordable, accurate, and easy to use measurement set would have wide appeal, particularly if it provided a broad range of functionality. Although often sufficient for a quick check, this approach is hardly accurate or reliable - but most of us have better things to spend our money on than an Audio Precision test set and better things to do with our time than look for 0.1dB alignment errors! When it comes to checking levels, frequency response, speaker phase and the like, most of us make do with a test CD and our mixer's meters, together with our ears, to assess the technical alignment. Hugh Robjohns tries out Terrasonde's funky DSP‑based handheld audio test and measurement set. The technical standards of any professional, semi‑pro, or hobbyist recording studio rely on accurate calibration. The Audio Toolbox is available in the original Mk I case, shown here, or a revised Mk II version.
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