Rockbox Development > Feature Ideas

Seek to N seconds of silence ? Large MP3 file of one side of 33 1/3 LP

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hughmanoid:
I haven't found anyone looking for a feature found in some old school or automotive cassete tape transport functions that may me useful to me and others.

I would like to have the skip or fast forward button (or DOWN ? button) chew through the file
and look for at least 1 second (or user defined) true (or near silence) and resume play with some
silence retained as a lead in (so I can get both hands back on my MIDI guitar and flail away.
Maybe a LONG press would initiate this function and a short press would skip to next file  ?

Sandisk support autoreplied to my plea and it appears no amount of cajoling will get them to implement this feature. 
I gave up and found ROCKBOX may address the other annoying REFRESHING YOUR MEDIA when nothing has changed other than charging from a usb power supply (not a PC).

I am converting 500 + 12'' LPs to one large  MP3 per side using Audacity.
I convert near silence to true silence manually between songs and also fade out and in.
I also clean up visible clicks and pops in each song as well as manually shrink peaks
and then amplify each song to normalize the volume across the entire LP.
Finally I apply the click and pop filter  to the entire file based on how bad the record has been abused. 

Even this minmal editing takes a long time and splitting tracks manually is even more time consuming.
I haven't found or mastered a reliable track splitter and hope in the future, one will be available
that maybe even pulls in actual song names into the metadata.  currently, I save 1 file per side
in a directory for each album in a folder under each artist.
For example Carole King\1971 Tapestry PE-34946 ODE\A0 Tapestry  and B0 Tapestry

At some point, when I split songs into separate files, I can name them A1 xxx,A2 xxx etc...
and maybe delete the master file if I run out of space.

Any ideas ?

saratoga:

--- Quote from: hughmanoid on February 22, 2013, 01:08:53 AM ---I would like to have the skip or fast forward button (or DOWN ? button) chew through the file
and look for at least 1 second (or user defined) true (or near silence) and resume play with some
silence retained as a lead in (so I can get both hands back on my MIDI guitar and flail away.
Maybe a LONG press would initiate this function and a short press would skip to next file  ?
--- End quote ---

This really isn't a feature we'd want in rockbox, both because its so specialized, and because its impractical given the hardware constraints we operate under.   Instead I would just prepare a playlist of files you want to play, and hit play when you're ready to go.


--- Quote from: hughmanoid on February 22, 2013, 01:08:53 AM ---At some point, when I split songs into separate files, I can name them A1 xxx,A2 xxx etc...
and maybe delete the master file if I run out of space.

Any ideas ?

--- End quote ---

For automating audio processing?  I suggest checking out an audio form like hydrogenaudio.  You're not the first person to record LPs.  Theres probably some software out there that can help. 

mborus:
For the benefit on anybody reading this post late:

mp3directcut (http://mpesch3.de1.cc/mp3dc.html) has the feature to identify and quickly remove blank space
from mp3s without re-encoding
and
sox (http://sox.sourceforge.net/) is a tool that allows you to analyse and edit sound files from the command
line and is great for batch jobs like the one you mentioned.

Both tools are free.

Also note that Audacity has a save as split file option that allows you to set markers and then save all tracks in seperate files.
This doesn't take longer than saving the recording in a big file.

stonux:
Silence is hard to detect reliably because of noise floor.
Not a job for tiny hardware.
Split up the tracks on your PC. I did not quickly find a FOSS doing so automatically.
Create a track with some seconds of silence giving you the time to get both hands back on your MIDI guitar and add it to your playlist.

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