Music Manager powers's library of 1M promotional downloads

Friday, 1 July 2011
by Matthew
filed under Announcements and Stuff Other People Made
Comments: 4

Ok, quick internet history lesson: Way back in 1997, there once was a site called It was famous as one of the first sites to encourage the free flow of music and took its name from what had been an obscure digital music file format, one that we all know and love today. It spread faster than a celebrity sex tape, building an audience that was massive and showed the world that digital files were a fantastic way to discover new music. It was also one of the first big internet music IPOs, raising a stupendous amount of money.

Not surprisingly, that money and audience made it infamous with the big music labels who fought hard to shut it down, creating a familiar yet vicious circle that has continued for more than a decade: technology makes content distribution fast and nearly frictionless; content rights holders throw grit and lawyers at the new products based on it until there is so much slowing it down that it eventually collapses under its own weight. We saw it happen again last week as shut out ex-US users due to licensing constraints.

But sometimes evolution steps in and changes the pattern a little bit.

Right around the same time some of us were packing our Wellies and heading out to Glastonbury, our parent company CBS Interactive Music group relaunched with a snazzy new interface and a whole load of great new content. We’re happy to say that it’s’s Music Manager that powers’s library of music and that’s artist wiki pages power a lot of the information on these new bands. The new is editorially driven, drawing on a small staff of writers and the Music team to comb through our library to introduce you to great tracks from great artists you might not have discovered yet, as well working with the labels to get new tracks from superstars and great indie bands who are already well-known.

But one of my favorite things about is that almost a quarter of the 13M tracks available in our streaming radio system are from unsigned or independent artists who aren’t affiliated with big labels and who own the rights to their music outright. These tracks are uploaded by new bands to’s Music Manager and this puts them into’s radio database. Bands can also choose to make those tracks into full-length promotional tracks that live on their artist pages and/or make them available for free download. This is, by far, the bulk of the music that’s available on and on That’s true to the original spirit of which did more to launch new bands than almost anyone else back in the late 1990s.

The new will have three features that we think are worth paying attention to:

Free MP3 of the Day
This is a daily feature that will offer free downloads of songs from the big name artists and fast rising indies. Most of CBS Radio’s US music stations will be promoting this on-air and so the featured tracks will be divided up into four of the most popular US radio formats: country, pop, rock and urban.

On the Scene
On the Scene is a more international feature, showcasing a city or area with musical significance with free songs from bands who come from that scene. Expect us to highlight both historical and brand-new scenes that catch our attention.

Label of the Week
The name already gives away the concept behind this one. Don’t let anyone tell you anything different: Not all labels are dying dinosaurs. The smart ones are just evolving and we’re here to help you find the fast moving mammals who we think will avoid the tar pits of doomed business models of the old-school music industry.

The last two weekly features above are written by the mighty Music team. Stefan, Nick, and Helen here in the UK want to hear from you. Help us feature your bands, your scenes, your labels. We’re committed to helping people discover vibrant new music and not just hyping the biggest and most popular bands.

We have big plans for Music Manager this summer. We’re adding better rights support for bands who have more complicated rights deals. We’re making it easier for bands to track the downloads and the impact of the tracks they distribute through us and through And we have some secret products and events coming later this year that will expand the promotion opportunities for indie bands coming up fast on our Hype Charts.

We also have some fun partnerships in the works to improve the tools that indie artists want to use to distribute their music to a wider audience. Stay tuned and if you are an indie artist who wants to reach more people, check out Music Manager and visit us on the label forums to talk about what you want from Music Manager.

Anatomy of the UK Charts. Part 3 - The Curse of the Drum Machine

Friday, 1 July 2011
by matthias
filed under Trends and Data
Comments: 13

This is the third part of the series, in which our Research Fellow Matthias analyses thousands of recordings from the UK singles charts using audio signal processing techniques. You can read Part 1 here and Part 2 here.

How does music change over time? Does it get faster, more complex, more diverse? In the course of the last few weeks we have learned that many aspects of music don't seem to follow that kind of simple trend. Rather, changes happen in less predictable ways. One of the most surprising examples of that emerged when we looked at the development of rhythm regularity in the UK charts...

The 80s Regularity Hump

The figure below visualises data that we've already used in the first part of this series to look for disco songs: rhythmic steadiness, or "rhythm regularity", as we will call it in here. To measure rhythm regularity we have written some audio analysis code that outputs a high value if the rhythm in an MP3 file often changes between consecutive 16 second sections, and a low value if consecutive sections don't change much. Our regularity extractor is based on a mathematical description of the rhythm in every second of a track known as Fluctuation Patterns (see Further Reading, below). When we plotted rhythm regularity over the years, to our surprise we didn't find a simple trend in either direction...

Instead, we found a regularity hump, right at the beginning of the 80s: the dark blue area shows the proportion of the charts in every year that is taken up by the most rhythmically regular tracks. Around the start of the 80s, the proportion of the most regular tracks increases noticeably, while the proportion of the most irregular ones diminishes. What could have fuelled this trend? One obvious suspect is the introduction of new technology. We have marked the release date of the first widely used drum machine, the Roland CR-78 in '78, and the first influential digital sampler, the Linn LM-1 in 1980 in the figure. We can't prove the connection but it's certainly a striking coincidence. Why does the proportion of highly regular tracks wane again in the mid 90s? Maybe people were fed up with very rhythmically regular music, or maybe drum machines simply got better at producing more diverse rhythms.

In either case, if this hump is really related to drum machines and samplers, we'd expect to see the trend in other kinds of data as well.

The 120 bpm Tempo Crunch

As the 80s seems to have been an unusual time for rhythm, it would be no surprise if we also saw striking things in the tempo of 80s music. We ran our tempo tracking software on the whole charts collection to measure the tempo of each section of each track in beats per minute (bpm). We then picked a single bpm value for each song by choosing the one attached to the most seconds of audio. At a first glance a plot of the average tempo per year didn't look very interesting (you can see it here). But then we noticed something unexpected. Have a look at the image below.

The heat map above shows you which tempos (in bpm) were unexpectedly popular in which years. For example, see the dark orange dot around tempo 100 in 1969? That means that tempos around 100bpm were more popular than usual that year (up by more than 2 percentage points). Admittedly, what's more striking is that there seems to be a downward pattern, as if some kind of music was getting slower and slower over the years. There's also a a strange cluster of tracks around 120 bpm from the early 80s to the early 90s - the big red blob in the middle.

Some tracks from the red blob:
 Prince - 1999 (120 bpm)
 Frankie Goes To Hollywood - Relax (117 bpm)
 808 State - In Yer Face (120 bpm)

Before we ask what this cluster means, let's make sure that this trend is really there, i.e. that the proportion of tracks around 120 bpm is really higher from 1982 to 1991 than in the rest of the time. It may seem obvious from the figure below, which plots the proportion of tracks between 116 and 124bpm over time. To be really confident that this is not due to chance we use a statistical test, a "2-sample test", which can check whether the difference is significant... and it is, with 95% confidence we can say that the difference is between 5.5 and 8.1 percentage points (details).

Our first thought was that songwriters in the 80s must have turned on their drum machines, loved what they heard and wrote a song to that beat - without changing the default tempo setting of 120 bpm. I would love this to be correct, but I have a hunch that it's not, especially after having found this highly interesting manual for writing a hit single written by The KLF in 1988. They say that "the different styles in modern club records are usually clustered around certain BPM’s: 120 is the classic BPM for House music and its various variants, although it is beginning to creep up", and also, "no song with a BPM over 135 will ever have a chance of getting to Number One" because "the vast majority of regular club goers will not be able to dance to it and still look cool".

In this track the KLF follow their own advice.
 The KLF - 3 a.m. eternal (120 bpm)

It seems that the KLF have a point. We wanted to know, and compared the tempo estimates to our tags, especially the "Dance" tag. The figure below suggests that the KLF were really right. We took all tracks within ranges of 10 bpm (75-85, 85-95, ... , 145-155) and plotted the proportion of them that were tagged "Dance". It turns out that the KLF had quite a good grasp of what was true from 1982 to 1991. The proportion of tracks tagged as Dance is clearly highest around 120 bpm...

So was the drum machine a curse? It's been a blessing for many dancers, and it has undeniably led to the emergence of whole new genres of music, often dance music. And dancers have taken it from the club to the charts. Incidentally, somewhere along the way they must have learned to look cool even at higher bpm rates... what we see for the years 1992 to 2001 suggests a rather radical change to quicker dance music quite different from the KLF's suggestion that the tempo is "creeping up". Check the figure below.

Dance music in the 90s has clearly moved on, even the songs that did get into the charts, and its got faster. However, there seems to be another current of music that counter-balances this, as our tempo heatmap further up suggests (though it doesn't prove it).

As a reward for trying to understand all our data visualisations today we leave you with two of our new multi-tag radio stations. 80s + Dance Radio 90s + Dance Radio

Next week, bring some some earplugs, as we will try to find out where all the racket comes from in The White Noise Boys [Edit: title changed to Survival of the Flattest].

Anatomy of the UK Charts series so far

Percussiveness and the Disco Diva - on the rise of disco in the mid 70s

Clash of Attitudes - on automatically telling punk from art rock

The Curse of the Drum Machine - this post

Further Reading

The original article on the Fluctuation Patterns feature is by Elias Pampalk, Simon Dixon, and Gerhard Widmer: On the evaluation of perceptual similarity measures for music. In Proceedings of the Sixth International Conference on Digital Audio Effects (DAFx-03), pages 7–12, 2003.

If you want to detect the tempo of a track automatically, try Matthew Davies's tempo tracker in the Queen Mary Vamp plugin library or Simon Dixon's BeatRoot.