[bookport] Re: Relative volume between text and mp3
- From: "Scott Duck" <sduck@xxxxxxxxx>
- To: <bookport@xxxxxxxxxxxxx>
- Date: Wed, 30 Mar 2005 15:11:30 -0600
Rob,
Can you explain about the audio clipping in simpler terms? I don't do much
with audio files accept listen to MP3s and so I don't know much of the
terminology. Are you saying that some audio files will sound distorted,
depending on the content? I will listen, mostly, to RFB&D AudioPlus books
and MP3s ripped from Windows Media Player. How susceptible are these to
distortion? Please forgive my ignorance.
Thanks,
Scott
----- Original Message -----
From: "ROB MEREDITH" <rmeredith@xxxxxxx>
To: <bookport@xxxxxxxxxxxxx>
Sent: Wednesday, March 30, 2005 10:26 AM
Subject: [bookport] Re: Relative volume between text and mp3
> Neal:
>
> The Book Port clips at approx. -2 dB with MP3 files. As you know, this
> may or may not impact you depending on the content. Content which is
> extremely dynamically compressed (most anything produced today and
> Audible.com stuff) will exhibit an audible clip at times. When playing
> material which is not heavily dynamically compressed, you will rarely,
> if ever, notice this.
>
> Unfortunately, there is nothing we can do about this at the time since
> it is a hardware issue. (Well, I guess we could normalize everything to
> -2 dB, but that would take lots of time and require decoding and
> reencoding.)
>
> Rob Meredith
> >>> ewers@xxxxxxxxxxxxxx 03/30/05 09:48AM >>>
> Larry, when I received my new book port, I put some MP3 files on the
> unit and played them back. I noticed that they sounded distorted even
> when using good powered speakers and with the volume of the book port
> considerably low. The files were normalized to 0 on Sound Forge and
> there was no clipping of the sound. The bottom line is that when I
> try to play an MP3 file that is close to 0 db, it sounds distorted on
> the book port. Even some of the books I have downloaded from Audible
> such as Bill Clinton's book, sounds distorted. That could simply be
> the quality of the book. However, the files I am talking about are
> ones I created which are well within the non-distorted range of audio
> and still play back as a bit distorted on the book port. So, I'm
> wondering if this suggests a slight lowering of the audio level
> relative to the synthesized speech?
>
> Just my observations.
> Neal
>
>
> -----Original Message-----
> From: bookport-bounce@xxxxxxxxxxxxx
> [mailto:bookport-bounce@xxxxxxxxxxxxx] On Behalf Of LARRY SKUTCHAN
> Sent: Wednesday, March 30, 2005 7:05 AM
> To: bookport@xxxxxxxxxxxxx
> Subject: [bookport] Re: Relative volume between text and mp3
>
>
> We did make an increase, but it isn't enough. We are already using
> full volume on the tts, so to change the relative volume, we will have
> to cut down on the audio, and I don't think we want to do that.
>
>
> >>> richard@xxxxxxxxxxxx Tuesday, March 29, 2005 4:47:01 PM >>>
> Hi Larry,
> In this latest firmware, the revision history says:
> "Increases the relative volume of the text-to-speech when playing an
> audio=20
> file."
> I just tried an mp3 file as part of testing the battery drain and the
> Book=20
> Port voice could hardly be heard over the mp3 file.
> Is that a feature not yet implemented?
>
> Thanks,
> Richard
>
>
>
>
>
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