Vortex Live

Jacken — Sat, 22 Mar 2008 15:25:03 +0000

For probably 20 years I’ve been searching for a song. An old friend of mine, Micke Fredriksson used to play this punk song from a live recording. The only thing I remembered was that they sang “They called me an animal, then they cut me up”. So sometimes I searched the net for the text, but could never find out the name of the song. Irritating!

But today I went to a vinyl record sale and I found it! As soon as I saw the album cover I knew that it was the right one. So now I can finally listen to Art Attacks masterpiece Animal Bondage

Vinyl crazy

Jacken — Tue, 04 Dec 2007 22:07:34 +0000

Well, let’s face it. The iPod have changed my interest in music during the last few years. With my 5 gig first generation iPod I had most of my music coded in 128kbit MP3 due to the constraints of the number of songs. The first year I put up with the included earphones and really didn’t think of upgrading.

But finally I got a Koss Porta Pro by recommendation from a friend. These headphones are not audiophile, but good enough to make me realize how much better MP3 files coded in 160 or higher sounded. But to accomondate that kind of upgrade in sound, forced me to buy a 15gb third generation iPod to fit more songs. So I recoded all my music to AAC in 160kbit and faced out older songs when I could get my hands on a higher quality version. The third generation iPod worked excellent for me for over three years. Then I upgraded my headphones to some in-ear headphones which took the sound quality up a notch again. A month ago I bought a iPod Classic 160gb and now have all music in lossless full quality.

But guess what, I bought a vinyl record player a while ago. Some would say that it’s a step backwards, but have to disagree. There is something about listening to vinyl. It’s like smoking a pipe, It’s a bit more involved. An other good aspect of this is that I’m forced to actually listen trough a whole song. But one thing is for sure, you need to invest in rather expensive equipment to get good performance from vinyl. But one can still find interesting records dirt cheap. It really is the black gold.

Ripping vinyl records on a Mac

Jacken — Tue, 30 Nov 1999 01:00:00 +0000

After getting my Emu 0404 USB 2.0 Audio Interface I have started to rip my vinyl record collection. I want to retain as much as possible of the amazing sound of vinyl, so I rip everything in 24bit 48khz. Why not use 96khz? Well, my preferred playback device, the Squeezebox only supports 24/48 unfortunately.

Here’s how I do it…

You need a RIAA preamp between the record player and the audio interface if you don’t have a amplifier with built-in phono input. I use a Cambridge – 640P Outboard Audiophile MM/MC Phono Stage that I have modified extensively. There are cheaper alternatives like this cheap MM preamp. There’s even preamps with built in USB. But I choose to use separate components which make it easier to upgrade later on. Because you always upgrade equipment. Trust me.

My favorite program for getting the audio to the computer is CD Spin Doctor that is bundled with Roxio Toast 9 Titanium. There are excellent free open source alternatives like Audacity, but I really like some of the features in CD Spin Doctor like finding the tracks automatically.

If you are going to put the ripped audio onto a CD, choose 44khz sampling rate. If you are fortunate enough to own the excellent SqueezeBox audio player, use 48khz. By using a higher sampling rate, you effectively get a larger frequency span on your recorded audio. A CD can produce audio up to 22000 hz but by using a 48khz you extend this to 24000 hz (see nyquist theorem). I’m totally deaf above 16000 hz but still “hear” that the higher frequencies are there when playing it. It sounds more “airy”. Go figure.

Settings for burning to ordinary CDs?

Use as many bits as you can. CDs have 16 bits per sample, but if you can, choose 24 bits in your recording software. We just have to downsample later on, after doing our edits.

Settings for a lucky Squeezebox owner?

The bog standard Squeezebox has a maximum on digital audio of 24 bit – 48khz, so that’s the optimal sampling settings. This will be a good setting for archiving your old precious albums just in case something happens. And playing them out through a Sqeezebox sounds fantastic! I would say, Almost vinyl.

I record the complete album, not even stopping between side changes, because it’s really easy to remove it later.

Use the selection tool available in the software you are using to select the songs one by one. Then save (or in some programs, export) them to an aiff file on your harddisk.

Time to fix the pops and scratches

[update] There’s actually a better way of doing it. Use ClickRepair instead. Easier, faster and better results. Heres the fun but time consuming part where we need to remove all the pops and scratches in an convenient way. My weapon of choice are Apples Soundtrack Pro. It’s bundled with Apple Final Cut Studio 2 If you have Soundtrack Pro already you are set. Then you could use it to record the whole album and thus not having to go through CD Spin Doctor.

Open up the file you saved from CD Spin Doctor or Audacity.

Drag the horizontal slider together to zoom in closer. This makes it easier to find pops and scratches.

Scroll to the beginning of the file and make sure to select Frequency Spectrum view which makes it a lot easier to find pops and scratches.

Your screen should now look something like this.

Now start playing the song. You should probably use earphones to make it easier to hear pops/scratches. As soon as you hear something, pause by pressing space and it should be pretty obvious where the scratch is, thanks to the Spectrum view. Scraches usually shows up as distinct white lines.

Select the white line but make sure to add a litte extra on both sides of the line.

Now choose the Clicks and Pops filter under the Analysis tab.

Press the Analyze button to let the filter find the scratch. The result will be displayed, but nothing has changed yet.

This shows that it found a click/pop, where and how long the duration and that it’s in both left and right channel. Now let’s fix it.

Press the Fix All button.

Put the marker before the fixed part of the song and press play. Listen if it sounds ok.

Now just continue to go through the song and fix all the scratches.

Why not just select everything and use the click/pop filter? Because you want to do changes to as little as possible to maintain the sound quality, and the filter really isn’t good at differentiate between dynamic sounds and click/pops. But when selecting a small part, the filter works like magic!