This role: For this role you would be being the voice of Kagamine Len. Everyone is welcome to audition. For Lens voice a medium male pitched voice would be preferred. Alto-tenor vocal range is also recommended since most of Lens songs are Higher for a male voice.

For the audition songs you may sing in either Japanese or English. Although in the future we will be singing in both languages.

About Kagamine Len: (from the vocaloid wiki)  

Kagamine Rin & Len (鏡音リン・レン), codenamed CV02, are Japanese VOCALOIDs developed and distributed by Crypton Future Media, Inc., and were initially released in December 2007 for the VOCALOID2 engine. They are the second set of vocals for Crypton's Character Vocal Series and are both Character Voice VOCALOIDs. There has since been numerous installments such as additional voice banks dubbed 'Append', an update to the VOCALOID4 engine, and an English vocal.

Their voices are provided by the Japanese voice actress, stage actress, and singer Asami Shimoda (下田麻美 Shimoda Asami). 

The development of the Kagamines began when Crypton formulated the concept of making a pair of female and male voicebanks. The first idea was for two voices of a girl and an identical male of the opposite gender, just like twins.[3]

Crypton originally had the intention of distributing them as twins, but this was not adopted. Crypton stated that they approved of the many different interpretations of Rin and Len's relationship that they saw in different works. Crypton's final announcement was that the Kagamines were neither siblings nor lovers.[4][5] During their Append's production, Wataru Sasaki (aka. Wat) described them as two bodies with one soul.[6] Wat also said that the Append boxart makes the pair seem like twins,[7] due to the foetal position they were in.[8]  When the Kagamines were being recorded in 2007, their names were not yet decided. Their given names of Rin and Len were said to be based on "right" and "left" according to Asami Shimoda. She later confirmed in an interview after the Append release that the names were based on Ken and Rin from Hokuto no Ken, derived from a discussion about names that were familiar from her childhood  

KEI was given a concept by Crypton that included Rin and Len's approximate ages as well as the idea of them being 'mirror images' and, like Hatsune Miku, androids. KEI was not given any further direction as he had already drawn the art for Miku, the first release in the Character Vocal Series.

Rin was the first of the Kagamines to be illustrated and, following Crypton's concept, Len was made to match her. Their leg features were designed to mimic speakers.[10][11] The keytar Len is often featured holding in merchandise is a YAMAHA KX5. Their main design, of which is most noticeable on their boots, uses the YAMAHA EOS as a design base. The Kagamines were marketed as "2 vocals for the price of 1" and were aimed to catch the interest of the growing VOCALOID fandom. Unlike Hatsune Miku, they were not an immediate hit, failing to meet marketing expectations despite receiving the same level of promotion Miku received at the time of their release. After the release of their "Act2" voicebanks, sales picked up steadily and the Kagamines eventually became one of the more heavily marketed VOCALOIDs though have never met the marketing strength Miku gained before them. 

Initially, it was reported that their package sold 20,000 units. This was half the amount that the Hatsune Miku product before them sold.[20]

During the VOCALOID2 era, the Kagamine package competed with the Megurine Luka package for 2nd place in the top 10 products. Usually, the Kagamine package managed to get the 2nd place spot, pushing Luka to 3rd place.

Their Append outsold the Miku Append package during the period after their release. The Act2 package and Append secured 4th and 5th spot between them in Crypton's end of year top 10 VOCALOID sales despite only being available for a short period of time (mostly owed, but not entirely, to pre-orders).[21][22][23] However, in June 2011, their Append had fallen to 8th place, one place below KAITO's VOCALOID voicebank.

During 2013, when both KAITO V3 and Hatsune Miku V3 were released, the charts were disrrupted. When the charts resumed some form of order, the Kagamines were left in the 5th or 6th spot, leaving them overall more popular than Luka by MEIKO V3's release in 2014. Their Append had not been sighted for months and was by now completely off of the charts. After MEIKO's V3 release, they disappeared from the charts, leaving them as the only Character Vocal Series member with no products in the charts. By mid-2014, they, along with the VOCALOID2 Megurine Luka package, would only make temporary appearances in the charts, but no longer held any form of constant ranking.

In 2014, Crypton's download store, Sonicwire, reported that the Kagamine Append package was the 8th most sold VOCALOID package on the store, while their Act2 product claimed 5th place.[24] In 2015, the Kagamine V4x package claimed 5th position, while the English bundle version claimed 4th. The sales were based on acquired sales through pre-orders and sales for just 6 days.[25] In January 2016, the bundled version of the update held the 1st place spot on Crypton's ranking, followed by the Japanese package in second. 

The Kagamines were slow to gain popularity in the Japanese fandom after the backlash from their original voicebanks. In later years, although they gained the second-highest number of songs, they were not as popular as Hatsune Miku.

In the Japanese fandom, Rin is the more popular of the two, with more related works than Len.

By the time of their V4x release, the duo had over 100 hit songs between them.[26]

Overall, Kagamine Rin is the 2nd most popular Crypton VOCALOID, while Len is the 4th. The majority of Japanese producers purchasing their package use Rin, wither having up to half of Len's popularity on top of her own popularity levels. Len can often at times loose his 4th position place to KAITO, if Rin's contributing popularity is not factored in. Rin herself will also at times lose popularity to Megurine Luka, though due to Rin's popularity being boasted by Len, Luka does not always maintain it.