Samsung Yepp U series
The YP-U1 was first announced in August 2005[9] then released in October 2005 in Asia and Europe and early November 2005 in the US.
The YP-U2 was released in different versions depending on the geographical area: in Korea the U2 was MSC only, featuring an FM tuner.
The main differences concern the hardware: the USB port is no longer retractable and is covered by a transparent cap, allowing glowing effects with two blue LEDs.
There is no major change in the firmware except the presence of the new DNSe sound engine, first introduced a few months ago on the YP-T7F.
The YP-U3 was first spotted end of March 2007,[14] then officially announced in May 2007 by Samsung Japan[15] and released in June/July in Asia and Europe.
Contrary to its predecessor, the U3 has touch controls (which was often criticized in reviews[16][17]), a new blue OLED screen and a half-size sliding USB connector.
Devices sold in Asia and the rest of the world are MSC and have a file browser instead of the tags library.
In the user manual, the battery life is rated up to 16 hrs with MP3 128 kbit/s files but due to the sleep mode this may be reduced.
It still has touch controls and a similar built-in sliding USB plug as the U3 but the plastic case design is quite different.
According to the official changelog, firmware v1.32 fixes occasional playback noise but also shortens battery life by about 2 hours.
The U5 introduces the "Popcon" characters, the fitness feature and the DNSe 3.0 core sound engine.
The fitness feature consists of an estimation of burned calories depending on several parameters, including one's weight and the exercise type (walk slow, walk fast, run slow, run fast, hiking, cycle or yoga).
Several features and settings like Clarity, Audio Upscaler, Wise Volume and Level Optimizer are lacking here, making the core version of the DNSe 3.0 worse than the standard version of the DNSe 2.0 embedded in the previous YP-U4 and several other players.
[28] The Samsung YP-U6 was first introduced at the IFA in September 2010 in Berlin then released early November 2010 in South Korea.
It is available in full black or pink and white colors and in two different capacities: 2 and 4 GB (respectively 59,000 and 69,000 won).
Several features and settings present in higher-range Samsung players like Clarity, Audio Upscaler, Wise Volume and Level Optimizer are lacking.
No feature was added or improved, the releases only fixed some bugs, some of them related to the battery charging process.
The Samsung YP-U7 is the latest device from the U series first released early September 2012 in Russia.
The U7 still features the same "now playing" screen as on the U5 and U6 but the main menu is different: the icons rotating like a cube are taken from the Android TouchWiz UI.
Also, models sold in Europe (EU and FR region codes) do not have FM radio in software.
Supposedly Samsung made this decision to avoid paying the European tax on FM tuners and therefore sell the device cheaper and/or increase its margin.
Like its two predecessors, the U7 has the study mode (repeat A-B and adjustable playback speed to learn foreign languages) and the fitness feature.
