Audio-Out using Chronos. Volume adjust?

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    Martin Rosenfelder

    Hi Annie,

    We are experiencing the same issue in our lab. Have you found a solution to the problem so far?

    If yes, we'd be curious to hear about.

    Many thanks in advance,

    best,

    Martin

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    Annie Laroche

    Hi Martin,

    Unfortunately no, I don't have any solutions (and neither did E-Prime support at the time).

    We did try to improve the quality of our audio files... using programs like Audacity... which may have helped. We also re-programmed the experiment so that it wasn't using Chronos. Audio out was done by the computer and so we had a bit of control over the volume by using the volume adjust buttons from the laptop itself. 

    Good luck!

     

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    Martin Rosenfelder

    Hi Annie,

    Thank you very much for your quick reply. What a pity that E-Prime / Chronos don't offer a solution to adjust the volume level. Your tip regarding re-programming the stimulus files was perfect. We've done that and it worked. 

    Using the laptop for sound output is for sure another solution. However, we've done that in the past, but refrained from it. The reason: Using the laptop's sound card the timing is not okay any more. There are offset delays bigger than +/-3ms, which we couldn't tolerate. The Chronos box has an internal function to adjust the E-Prime and the EEG's internal clocks. So we will keep on using the Chronos.

    Good luck also for your future experiments.

    Best,

    Martin

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