Speech Technology STC-H476 Manuel utilisateur

Users Guide

GNOME 7.0

Portable Digital

Stereo Voice Recorder

STC-H476

User Guide

Manufacturer retains the right to make amendments to the manual, connected with improve-

ment of the voice recorder design, without extra notification.

Amendments made will be published in new edition of the manual and at the company’s web

site: http://www.speechpro.ru

If you have any questions regarding the use of the voice recorder, please contact the company’s

technical support or the support of its regional dealers.

Technical support contacts:

Saint-Petersburg

Phone +7(812) 325-8848

Fax: +7(812) 327-9297

Moscow

Phone: +7(495) 661-7550

Fax: +7(495) 661-7517

Technical support email: support@speechpro.com

Technical support at the company’s web site: http://www.speechpro.ru/support

For contact with the technical support please be ready to deliver the following information:

–Clear description of the problem;

–Device name and serial number;

–Type of computer and its configuration.

CONTENTS

INTRODUCTION.............................................................................................................................................3

TYPOGRPAPHIC CONVENTIONS ..................................................................................................................................3

TRADEMARKS ...................................................................................................................................................................3

GENERAL INFORMATION ............................................................................................................................4

DESIGNATION...................................................................................................................................................................4

ABOUT THE PRODUCT ...................................................................................................................................................4

PERFORMANCE SPEIFICATIONS................................................................................................................5

CAPABILITIES ..................................................................................................................................................6

GENERAL............................................................................................................................................................................6

CONTROLLING AND DISPLAYING FUNCTIONS........................................................................................................6

VOICE RECORDER CAPABILITIES ..................................................................................................................................6

CAPABILITIES OF THE VOICE RECORDER CONTROL SOFTWARE .........................................................................7

RECORDING DURATION.................................................................................................................................................8

GETTING STARTED ........................................................................................................................................9

INSERTING MEMORY CARD...........................................................................................................................................9

INSERTING BATTERIES.....................................................................................................................................................9

CONNECTING THE RECORDER TO EXTERNAL DEVICES ...................................................................................... 10

CONTROLS ................................................................................................................................................... 11

SWITCHING ON AND OFF........................................................................................................................ 12

SWITCHING THE VOICE RECORDER ON .................................................................................................................. 12

SWITCHING THE VOICE RECORDER OFF................................................................................................................. 12

RECOMMENDATIONS FOR THE BATTERY USE ...................................................................................................... 12

DISPLAY STATUS INDICATION................................................................................................................ 13

DISPLAY VIEW WHEN RECORDER IS ON ................................................................................................................. 13

1st SCREEN LINE............................................................................................................................................................ 14

2nd SCREEN LINE.......................................................................................................................................................... 15

3d-4th SCREEN LINES .................................................................................................................................................. 15

5th SCREEN LINE........................................................................................................................................................... 15

6th-8th SCREEN LINES................................................................................................................................................. 16

9th SCREEN LINE........................................................................................................................................................... 16

10th SCREEN LINE......................................................................................................................................................... 17

11th SCREEN LINE......................................................................................................................................................... 17

SIGNAL LEVEL INDICATOR.......................................................................................................................................... 17

RECORDING ................................................................................................................................................. 18

FILE NAME.................................................................................................................................................... 19

RECORDING PARAMETERS ADJUSTMENT........................................................................................... 21

CONTENTS

TIMERS........................................................................................................................................................... 25

LOOP.............................................................................................................................................................. 30

VOICE ACTIVITY........................................................................................................................................... 32

MEMORY....................................................................................................................................................... 34

PIN CODE...................................................................................................................................................... 36

DATE AND TIME.......................................................................................................................................... 38

MISCELLANEOUS........................................................................................................................................ 40

PLAYBACK .................................................................................................................................................... 42

FILE DELETING............................................................................................................................................. 46

INFORMATION ABOUT VOICE RECORDER .......................................................................................... 47

INSTALLATION OF THE VOICE RECORDER MANAGER..................................................................... 48

LAUNCHING VOICE RECORDER MANAGER ........................................................................................ 50

DESCRIPTION OF THE VOICE RECORDER MANAGER....................................................................... 51

MAIN WINDOW............................................................................................................................................................. 51

RECORD OPTIONS SETUP ........................................................................................................................................... 53

DATE AND TIME SETUP............................................................................................................................................... 55

TIMER SETUP.................................................................................................................................................................. 56

CHANGING PIN.............................................................................................................................................................. 57

INTERNAL PROGRAM UPDATE.................................................................................................................................. 58

FILE MANAGER WINDOW........................................................................................................................................... 59

CONVERSION INTO MP3 FORMAT............................................................................................................................ 60

FILE SIGNATURE............................................................................................................................................................ 61

DIGITAL SIGNATURE VERIFICATION ......................................................................................................................... 62

PRIVATE KEYS EXPORT................................................................................................................................................. 64

PRIVATE KEYS IMPORT................................................................................................................................................. 65

PUBLIC KEY EXPORT..................................................................................................................................................... 66

ABOUT PROGRAM........................................................................................................................................................ 66

EXIT PROGRAM.............................................................................................................................................................. 66

DELIVERY SET............................................................................................................................................... 67

Base Case “Business”.................................................................................................................................................... 67

Extended Case “Professional”.................................................................................................................................... 67

Optional Equipment and Software.......................................................................................................................... 67

WARRANTY .................................................................................................................................................. 68

REGISTRATION CERTIFICATE ................................................................................................................... 69

INTRODUCTION

TYPOGRPAPHIC CONVENTIONS

The manual contains the following typographical conventions:

Formatting Description

Bold Applies for printing of names of construction and software components

and names of control and information interface elements (headings, but-

tons, etc.).

Bold italics Applies for printing file names and access paths.

Format PCM16 Line on the voice recorder screen

In the Manager program description the word combination «click a button» means: «to place

the mouse pointer on the button and click it».

The following notification types are used in the manual.

Note: Indicates important information that helps you make better use of the product.

Caution: Informs you about potential problems with hardware or software.

Warning: Warns you about serious problems in a certain situation and tells you how to avoid it.

TRADEMARKS

The names Windows, Windows XP and Windows 7 are trademarks of Microsoft ® Corporation.

Logotypes and mark memory cards SecureDigital (SD) and SDHC (Secure Digi-

tal High Capacity), developed by Matsushita (Panasonic), SanDisk and Toshiba.

All the other names of companies and products, mentioned in the document, are the property of

their corresponding owners.

No part of the present edition is subject to reproduction, transmission, storage in search system or translation into any lan-

guage in any form, by any means without written consent of the company «Speech Technology Centre».

GENERAL INFORMATION

DESIGNATION

Gnome 7.0 is a portable digital stereo voice recorder (voice recorder further on). It is a profes-

sional recording device that is designed for mono or stereo recording in a noisy acoustic environment.

The voice recorder may be used for a real-time (without preliminary preparation) speech record-

ing during investigative actions, business negotiations, lectures, judicial sessions, meetings, interviews

and etc. both inside and outside.

You can find the voice recorder’s appearance on the figure 1.

Figure 1 – Appearance of the voice recorder

ABOUT THE PRODUCT

Name: Portable digital stereo voice recorder Gnome 7.0

Label STC-H476

Producer: Speech technology center, Ltd.

Postal Address: Russia, St. Petersburg, Krasutskogo st. 4, PO 196084

Phone: +7 (812) 325-88-48

Fax: +7 (812) 327-92-97

PERFORMANCE SPEIFICATIONS

Feature Value

Recording channels 2

External microphone inputs (stereo) 2

Line inputs (mono/stereo) 2

Flash memory volume, GB 4

Plug-in memory card volume, GB Up to 32

Plug-in memory card type microSDHC

Recording format PCM 16 and 24 bit without compression;

with compression acc. to A- or μ-law

Sample rate, kHz 8; 11.025; 16; 22.05; 32; 44.1; 48; 96

Amplitude-frequency characteristic ripple, dB, no more than 2

Coefficient of harmonic distortion at recording of sound through

line input (without compression) with nominal level at 1000 Hz,

%, no more than

0,06

Coefficient of harmonic distortion at recording of sound through

microphone input (with compression) with nominal level at

1000 Hz, %, no more than

0,15

Signal-to-noise ratio if using the line input (a lossless format,

without compression) with nominal signal level at 1000 Hz, dB, no

less than

Signal-to-noise ratio if using the microphone input (without

compression) with nominal signal level at 1000 Hz, dB, no less

than

Dynamic range of the recorded signals, If the AGC is on, (without

compression), dB, not less than

Built-in microphones 2

Microphone type electret

Built-in microphone susceptibility level, dB minus 55

Microphone noise floor, dB 25

Battery total charge time, hours 3

Maximum battery life in:

– recording mode, hours, not less than 14

– timer mode, hours, not less than 200

– «Voice Activation» mode, hours, not less than 72

Interface with a computer USB 2.0 High speed

Compatibility with operating systems Windows XP, Windows 7

Interface language Russian, English

Temperature range, °С minus 5 to plus 40

Relative humidity at temperature 25 °С, % 80

Error-free running time with probability 0,98, hours 2000

Dimensions, mm 114х39х18,5

Weight, with batteries, g 125

Product material metal

CAPABILITIES

GENERAL

Audio is recorded onto a removable microSD card. The flash memory card compatible with the

voice recorder is microSDHC (Secure Digital High Capacity).

For correct and proper functioning of the voice recorder, use microSD cards, Speed Class 6 or

higher.

Audio is recorded with built-in or external microphones, or line inputs of the audio equipment.

You can control the recording process manually and/or automatically (with preset timers or by

the level of the input signal).

The voice recorder has such controllers as switch and LCD screen indicators; you can use them to

regulate the voice recorder’s work and also aurally with the help of head phones.

For the power supply of the voice recorder can be used different sources: two accumulator bat-

teries LR03 of ААА size, non-recoverable power element, external source of direct current or a USB-

port for connecting to a computer.

CONTROLLING AND DISPLAYING FUNCTIONS

The voice recorder has the following controlling and displaying functions:

– Controlling the audio recording process with the RECORD-STOP switch and buttons;

–Switching on and off;

–Holding buttons deactivated;

–Setting the recording parameters with the buttons;

–Displaying operating modes on the screen;

–Automatically detecting and displaying the connected accessories;

–Indication of the voice recorder operating modes;

–Erasing the recorded data;

–Regulating the battery charge level;

–Switching on and off the noise cancelling on playback.

VOICE RECORDER CAPABILITIES

The voice recorder and the control software used with it both provide the following capabilities:

1. Recording (RECORDING, p. 18):

– Of stereo or mono signals;

CAPABILITIES

– Audio files and saving them to the built-in nonvolatile memory, 4 GB;

– Audio files and saving them to the replaceable nonvolatile microSD cards;

– With built-in or external microphones, and also through line inputs;

– And automatically detecting the input signal type, fed to the external jack (IN jack);

– In PCM format (16 or 24 bit) with or without compression by μ- or А-law;

– With different sample rate according to the recording conditions;

– By sliding the RECORD-STOP switch (p. 18);

– With auto stop mechanism when the signal reaches a predetermined threshold (p. 32);

– Cyclically and storing to a memory-saving card (p. 30);

– According to a timer schedule (p. 25).

2. Additional recording functions:

– Effective automatic recording level adjustment in left and right channels;

– Automatic power-saving display mode;

– Automatic menu locking when the recording starts.

3. Recording list view and its playback (p. 42).

4. While playing back, the following functions are available (p. 42):

– Noise cancellation;

– Changing the playback speed;

– Adjusting volume in every channel separately;

– Setting time stamps (markers, tags, marks) during continuous playback;

– Searching the signal fragments that contain speech.

5. Protecting from non-authorized listening and copying (p. 64).

6. Using PIN (Personal Identification Number) to access the voice recorder controls (p. 36).

CAPABILITIES OF THE VOICE RECORDER CONTROL SOFTWARE

The voice recorder control software allows executing the following operations:

– Setting the recording parameters (p. 53.);

– Setting date and time (p. 55.);

CAPABILITIES

– Setting the timers (p. 56);

– Setting and changing PIN-codes (p. 57);

– Updating the voice recorder’s software (p. 58);

– File management (p. 59);

– Converting from WAV to MP3 (p. 60);

– Digital signature verification (p. 61);

– Exporting and importing private keys (p. 64);

– Exporting public keys (p. 66).

RECORDING DURATION

Recording duration depends on the selected parameters and the available memory space.

If you use lithium batteries, 1.5 V, the continuous recording duration, with PCM, 16 kHz, stereo

and free memory (internal and microSD) space available is about 30 hours.

For convenience of preliminary planning of sound recording, the recording duration for various

modes and sample rates are the table below. Calculation is provided for 4 GB of memory.

Mode

Recording duration, hrs.

Sampling rate

16 kHz 8 kHz

μ-law 8 bit, mono 72.5 145

μ -law 8 bit, stereo 36.3 72.5

PCM 16 bit, mono 36.3 72.5

PCM 16 bit, stereo 18 36.3

PCM 24 bit, mono 24 48

PCM 24 bit, stereo 12 24

If you wish to increase the recording duration, you should use the mono recording mode and

data compression.

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