HOW DO I REMOVE CRACKLING SOUND FROM CASSETTE RECORDING?

H Gordon · Post by **H Gordon** » Wed Jul 30, 2014 9:09 pm

I am converting hypnosis cassette tapes to mp3 - the tape cassette plays well and the recording is clear but once I have uploaded this to Audacity there is a harsh crackling sound when the speaker is talking? I have reduced input volume, done effect - noise reduction but not sure how to go any further - any help would be welcome.

Post by **Gale Andrews** » Thu Jul 31, 2014 11:30 am

It sounds like the input volume is too loud. Choose View > Show Clipping. Do you get red lines where the speaker is? If so the voice is too loud.

Please read the pink panel at the top of the page and give us version of OS X and version of Audacity. What is the make and model number of the cassette player? What type of Mac? How are you connecting the tape player to the Mac?

Gale

H Gordon · Post by **H Gordon** » Fri Aug 01, 2014 8:36 am

In order of your questions.

No I do not get red lines and indeed have put input volume right down to 4 on the slider scale thinking this must be the problem - it did remove static but not the crackling which only happens when there is voice.

I am running OX 10.9.4 and audacity 2.0.5.

I am using a sony cassette-corder CFD-E100L and connecting it via a cable from headphone slot to the desktop mac input microphone slot.

Any suggestions would be welcome!

Post by **Gale Andrews** » Fri Aug 01, 2014 11:04 am

Presumably you have only this one audio input on the Mac? What is the exact model number of the Mac?

Can you attach five seconds of voice that has the crackling? Please see How to post an audio sample .

Gale

H Gordon · Post by **H Gordon** » Fri Aug 01, 2014 2:41 pm

I am using Mac desk top circa 2009 2.66 GHz Inter Core 2 Duo, it has separate jacks for input and output - I could not get my laptop to work.

I am having trouble uploading WAV file as they are above 1M - have uploaded it to dropbox but unsure not to link it to this forum - apologies I learn on the job so to speak.
regards

Post by **Gale Andrews** » Sat Aug 02, 2014 11:36 am

H Gordon wrote:I am having trouble uploading WAV file as they are above 1M

If you just drag-select five seconds of distorted voice in the blue waves then do File > Export Selection... and export as WAV, the file will be less than 1 MB.

H Gordon wrote:have uploaded it to dropbox but unsure not to link it to this forum

You would right-click over the file and choose the option to share it. Then give us the web address of the file from the address bar in your web browser.

Gale

H Gordon · Post by **H Gordon** » Mon Aug 04, 2014 6:14 pm

https://dl-web.dropbox.com/get/Child%20 ... bhhgAprLFg
let me know if this works

Post by **Gale Andrews** » Mon Aug 04, 2014 11:30 pm

H Gordon wrote:https://dl-web.dropbox.com/get/Child%20 ... bhhgAprLFg
let me know if this works

"Resource could not be found" occurs when I click that link.

Gale

H Gordon · Post by **H Gordon** » Tue Aug 05, 2014 7:00 pm

hopefully this will work!

Post by **Gale Andrews** » Wed Aug 06, 2014 1:12 pm

Mavericks living up to its name again. It sounds and looks like small dropouts.

Is it a MacBook Pro?

Are you running lots of different applications while recording, or running Skype?

If that's not the case, Audacity > Preferences..., Recording section, and try a different "Audio to buffer" setting.

Gale

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HOW DO I REMOVE CRACKLING SOUND FROM CASSETTE RECORDING?

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