Studio Six Digital LLC S6D User Manual

Combination audio line input, line output, digital optical output, headphone amp, and microphone input accessory for iphone 4, ipod touch 4, and ipad

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iAudioInterface2

User Guide

tudio

igital LLC

V 1.3 November 1, 2011

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Page 1 iAudioInterface2 User Guide tudio igital LLC V 1.3 November 1, 2011...
Page 2 iAudioInterface2 User Guide Page 2...
Page 3 Studio Six Digital LLC for any purpose or give rise to any liability of Studio Six Digital LLC. In no event will Studio Six Digital LLC be liable for any incidental, indirect, special, or consequential damages (including lost profits) arising out of or relating to this publication or the information contained in it, even if Studio Six Digital LLC has been advised, knew, or should have known of the possibility of such damages.
Page 4: Quick Start
Quick Start iAudioInterface2 (iAI2) is a combination audio line input, line output, digital optical output, headphone amp, and microphone input accessory for iPhone® 4, iPod touch® 4, and iPad®. It connects to the attached iOS device using a digital audio link for lowest noise and highest quality audio.
Page 5: App Installation
Your iOS device always runs off its own internal battery, unless iAI2 is connected and an external power supply is plugged into iAI2. In that case, your iOS device will be powered from the external power supply, and the iOS device internal battery will be charging. See the power / charging section of this manual for more information.
Page 6: Block Diagram
Block Diagram from iOS Device Digital iAudioInterface2 Block Audio Outputs Output Diagram Level Control Line Input Gain Select Output Level Control Enable Optical Digital Right Input Source Input Select Audio to iOS Device Output Digital Audio Balanced / Inputs Stereo Output Select Left Input Right...
Page 7: Line Input
Connections Configurations iAudioInterface2 may be setup in a number of ways depending on your needs. The input and output can be mono or stereo, the output level control can be enabled or disabled, and there are several available gain ranges for the inputs. It is also possible to internally connect the line output to the right input, in order to monitor the output level directly (AudioTools only).
Page 8: Line Output
The line input supports three ranges, -90 dBu to -10dBu, -70dBu to +8 dBu, and -35 dBu to +40 dBu. These input ranges are available whether you are in stereo or mono mode. Line Output Outside of AudioTools, the output connector is configured as a stereo headphone jack by default. For example, if you play music from your device, you will hear the music in stereo.
Page 9: Microphone Input
Microphone Input The microphone input supports phantom powered microphones, or unpowered (dynamic) microphones. The microphone input has six fixed gain steps, from 0 dB to +50 dB. AudioTools allows you to set different hardware gain settings for each of two gain ranges: High and Low.
Page 10: Charge Status Indicator
Power The power inlet connector will accept a 5.5mm plug with 2.1mm pin. It requires 12VDC-18VDC at 1.5A, pin positive. When the power adapter is plugged in, it will charge the internal battery, and any iOS device that is also connected. Charge Status Indicator The charge status indicator will be off while charging the internal battery.
Page 11: Power Options
Power Options iAI2 has an internal li-ion battery, so it never draws power from your iOS device. And, when an external power source is plugged into iAI2, it charges its own battery, and the battery in any iOS device that is attached to it. External Power Source iAI2 will run off of any power source that can deliver 12-18 VDC at 1.5A.
Page 12 AudioTools App iAudioInterface2 is designed to work with the Studio Six Digital App “AudioTools”, which is available for download on the App Store. When used with AudioTools, all of the features of iAudioInterface2, such as multiple gain ranges and output configuration, are available. When used with any other App, iAudioInterface2 operates in the configuration specified on the Settings- >Configuration Settings screen of AudioTools.
Page 13 Phase Meter Phase Meter is used to measure the phase angle between two sine waves. THD+n You can measure Total Harmonic Distortion + noise (THD+n) with iAudioInterface2. To do this, the App will generate one of several octave-band sine waves, which are routed to the device under test (DUT).
Page 14 Calibration Since the calibration values are stored in your iOS device, you must calibrate iAudioInterface2 to any iOS device to which it is attached. Although you can use iAudioInterface2 without calibrating it, you will get the most accurate results if you calibrate it. We also provide factory calibration service of your complete setup.
Page 15 To begin calibration, select Low Range (darker). Select gain range +10 as a starting point (see picture below). Turn on Phantom Power, if required by your microphone. Now attach and turn on your calibrator. Leave the calibrator running for the remainder of this procedure. Before setting the calibration value, you need to select an appropriate microphone gain range.
Page 16 Now that your gain ranges and calibrator settings are complete, you can select either the low or high gain range, or use Autorange to let AudioTools pick the gain range for you. Microphone Calibration by Matching If you do not have access to a microphone calibrator, but you do have access to a calibrated SPL meter, you can do basic calibration by matching iAI2 to the SPL meter.
Page 17 Select Mid Range (darker). Enter the “Line Input Mid Range Trim Value” from the Calibration Card into the Trim field, by tapping the field. Tap Done when complete. Select High Range (darker). Enter the “Line Input High Range Trim Value” from the Calibration Card into the Trim field, by tapping the field.
Page 18: Specifications
Specifications All specifications are subject to change. Microphone Input +0 to +50 dB gain available in 9 ranges. Equivalent Input Noise (EIN) -112 dBu A-weighted 48V phantom power, +1.0, -3.0V at 13ma. Line Input Noise floor to clipping, -85 dBu to +45 dBu. Frequency response 20-20kHz +0.0 -0.50.
Page 19: Warranty
Warranty Studio Six Digital LLC (Manufacturer) warrants the Products, so far as the same are of its own manufacture, against defects in material and workmanship under the normal use and service for which they were designed, for a period of one (1) year after date of shipment. Manufacturer's obligation under this warranty being limited, at its option, however, to the replacement or repair of a part or parts determined by it to be defective.

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