Audiometry – CD Play Back
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The ACAM System Audio CD Capabilities:

Audio CDs can be played in the speech audiometry, the hearing instrument fitting, and the children audiometry windows of the ACAM System.


There are specific requirements that must be met in order to play an audio CD in the ACAM System:

  1. Does ACAM know the CD?
  2. Does a control file exist for the CD?
  3. Does the CD provide encrypted audio files?


Note:

It is not possible to present audio files through any soundcard and through any channel as a wave file because this would result in a penalty of copyright violation.


Method for Playing Audio CDs in the ACAM System:

  1. The physical audio CD must be inserted into the computer system in order to play the audio files.
  2. If an audio CD is read and identified correctly by the system, its' name will appear in the CD-ROM window (Figure 142).
  3. If a control file exists for this CD it is displayed in the ACAM System. Up to 20 control files can be saved in the ACAM System database. The control file provides access to the individual word events and displays them in the software.
  4. The audio files of the CD are always presented through the computer's soundcard. If the computer's soundcard is not connected to the ACAM System audio playback will not be possible.
  5. The audio files of some CDs will be opened as encrypted files. These files will be available on the computer being used. If the ACAM System detects that a control file is available in a special directory of the ACAM System, the special directory files will be used to playback the audio files. 
  6. When you do not start the ACAM System with the CD to be used as recommended above, click on the button <identify now CD>. The ACAM System will identify the CD and look for it in the ACAM System database.

Figure 142: Identification of an audio CD in the ACAM System


Different options for CD Playback:

Figure 143: an unknown CD is inserted

Figure 143: an unknown CD is inserted


  1. The play back is performed based on the selected track.
  2. Control the CD by clicking <go> or <start>.
  3. The words or word lists contained in the audio file cannot be viewed on the screen.


Figure 144: A known CD is inserted and a control file exists in the ACAM System

Figure 144: a known CD is inserted and a control file exists in the ACAM System


  1. The play back is performed based on the selected track.
  2. Control the CD by clicking <go> or <start>.
  3. The words or word lists contained in the audio file can be viewed on the screen.




Figure 145: A known CD is inserted, but a control file does not exist for the CD

Figure 145: A known CD is inserted, but a control file does not exist for the CD


  1. The play back is performed based on the selected track.
  2. Control the CD by clicking <go> or <start>.
  3. The track name is not displayed, but the descriptions assigned to the tracks (if implemented in the ACAM System database) are displayed. 
  4. The CD tracks are played back in order of how the tracks appear in the ACAM System. The selection list may be in a different order than the actual CD track list. 


Figure 146: CD contains different data for the left and right channels. First entry of the audio CD is selected.


Figure 146: CD contains different data for the left and right channels


  • When a single CD contains different data to be played in the first and second channels, several entries with the same name will exist in the ACAM System database.
    • The Westra CD #4 contains the Goettingen Sentence Test in channel one and the Mainz Children Test in channel two.
  • In Figure _ , the first entry of the audio CD (containing information for the first and second channels) has been selected in the ACAM System software. 









Figure 147: CD contains different data for the left and right channels. Second entry of the audio CD is selected.

Figure 147: CD contains different data for the left and right channels


  • When a single CD contains different data to be played in the first and second channels, several entries with the same name will exist in the ACAM System database.
    • The Westra CD #4 contains the Goettingen Sentence Test in channel one and the Mainz Children Test in channel two.
  • In Figure _ , the second entry of the audio CD (containing information for the first and second channels) has been selected in the ACAM System software. 


Figure 148: Select CD over Aux 1 channel 1 to playback the first entry of the audio CD

Select CD over aux 1 channel 1 for the playback of the first entry of the audio CD.

Figure 149: Select CD over Aux 1 channel 2 to playback the second entry of the audio CD

Select CD over aux 1 channel 2 for the playback of the second entry of the audio CD.