This report analyses data collected from Last.fm and used to create a real-time recommendation system. We collected over 2M songs and 1M tags and 372K user's listening habits. We characterize users' profiles: age, playcount, friends, gender and country. We characterized song, artist and tag popularity, genres of songs. Additionally we evaluated the co-occurrence of songs in users' histories, wh...

Nowadays we are often faced with huge databases resulting from the rapid growth of data storage technologies. This is particularly true when dealing with music databases. In this context, it is essential to have techniques and tools able to discriminate properties from these massive sets. In this work, we report on a statistical analysis of more than ten thousand songs aiming to obtain a comple...

The purpose of this study is to determine if the phonemic voice quality distinction of Dinka is also conveyed in songs. Acoustic measurements (formant tracking and spectral regression) were applied for the first time to a song data set. The results clearly pointed towards a neutralization of the voice quality distinction in songs. A perception experiment was performed to back up the results of ...

It is well established that the lunar cycle can affect the behaviour of nocturnal animals, but its potential to have a similar influence on diurnal species has received less research attention. Here, we demonstrate that the dawn song of a cooperative songbird, the white-browed sparrow weaver (Plocepasser mahali), varies with moon phase. When the moon was above the horizon at dawn, males began s...

The elaborate songs of songbirds are frequent models for investigating the evolution of animal signals. However, few previous studies have attempted to reconstruct historical changes in song evolution using a phylogenetic comparative approach. In particular, no comparative studies of bird song have used a large number of vocal characters and a well-supported, independently derived phylogeny. We...

General characteristics of Singapora Dworakowska and a key to known species of the genus are provided. Six new species, Singapora candela, S. excedens, S. falcata, S. longiantrosa, S. triacantha and S. yingjiangica spp. nov. are described and illustrated, with two new records, S. shivae Dworakowska from China and S. bannaensis Song & Li from Thailand.

Learned bird songs are often characterized by a high degree of variation between individuals and sometimes between populations, while at the same time maintaining species specificity. The evolution of such songs depends on the balance between plasticity and constraints. Captive populations provide an opportunity to examine signal variation and differentiation in detail, so we analyzed adult mal...

From the works of mathematical properties of songs, we construct the phylomemetic trees of Indonesian ethnic and traditional songs. The memeplexes are then reflected by the used notes and respective durations as they exhibit the Zipf-Mandelbrot law, the gyration coefficient, “spiraling effects”, and the dynamic entropy shown in the structure of the songs. The cladistic techniques yielding phylo...