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The cassette adapter allows one to play music through sound systems with a tape player without the need for an auxiliary input. ==Usage== A cassette tape adapter is a device that allows the use of portable audio players in older cassette decks. This is useful for cars, which often lack inputs for portable devices. Originally designed to connect portable CD players to car stereos that only had cassette players, the cassette tape adapter has become popular with portable media players even on cars that have CD players built in. In the case of AM/FM systems without cassette playback, FM transmitters are recommended. A typical cassette adapter uses a single-sided writing tape head (similar to the recording head on a traditional tape deck) connected to a stereo minijack connector with a cord. The cord is connected to the device's output (or headphones) port and the electrical signal is converted into a magnetic signal by the head. This magnetic signal is then received by the tape deck's reading head, converted back into an electrical signal, and amplified by the sound system. Because most cassette adapters use a single-sided head, they only work in one direction. There are, however, some cassette adapters that have double-sided heads that work in either direction. A newer type of adapter is a type of cassette shaped mp3 player, which commonly can be used as a stand alone mp3 player with headphones, or inserted as a cassette into the cassette player, where it can be used together with a remote control. These usually have a double sided head which means they can work in both directions. A common alternative to cassette adapters is FM transmitters. These devices often require external power and convert the device's electrical signal into radio waves which are then transmitted over an unused FM frequency to a nearby FM tuner. The cassette adapter is usually considered superior as it is much less prone to interference. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Cassette tape adaptor」の詳細全文を読む スポンサード リンク
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