Midi data transmitter, receiver, transmitter/receiver, and midi data processor, including control blocks for various operating conditions

A MIDI data processor for processing MIDI data delivered from a MIDI data output device and delivering processed MIDI data to a MIDI instrument, comprising:

• a determination block for determining whether or not said MIDI data delivered from said MIDI data output device is note-on data;
• a counter starting to operate when said determination block has determined that said MIDI data is said note-on data;
• and
• a control block for generating note-off data having a note number identical to a note number of said note-on data when the count of said counter has reached a predetermined value.

In a MIDI data transmitter for a MIDI instrument which delivers MIDI data for transmission of performance information, said MIDI data transmitter being connected to said MIDI instrument and including modulation means for modulating a high-frequency signal by said MIDI data delivered from said MIDI instrument, and data other than said MIDI data, a transmitter block for transmitting a radio signal prepared by modulation of said high-frequency signal to a receiver, and a transmission control block for controlling start of transmission by said transmitter block,

• the improvement comprising:
• a transmission data output block for transmitting said MIDI data and said other data to said transmitter block;
• transmission time-measuring block for measuring a transmission time having elapsed from a start of transmission by said transmitter block;
• and
• control means for performing control such that said transmission data output block delivers said other data to said transmitter block until said transmission time reaches a predetermined time period, and delivers said MIDI data to said transmitter block after said transmission time period has reached said predetermined time period.

In a MIDI data receiver for a MIDI instrument which delivers MIDI data for transmission of performance information, said MIDI data receiver being connected to said MIDI instrument and including a receiver block for receiving a radio signal modulated by said MIDI data and other data, demodulation means for demodulating said received radio signal, and a received data output block for delivering received data based on said demodulated radio signal to said MIDI instrument,

• the improvement comprising:
• reception-detecting block for detecting reception of data, based on said received radio signal and/or said demodulated radio signal;
• reception time-measuring means for measuring a reception time having elapsed after said reception-detecting block has detected said reception of said data:
• and
• output control means for performing control such that said received data output block delivers said received data to said MIDI instrument after said reception time has reached a predetermined time period.

A MIDI data transmitter including a MIDI data storage block for storing MIDI data delivered from a MIDI data output device for transmitting performance information, and a transmitter block for transmitting said MIDI data stored in said MIDI data storage block by a radio signal,

• said MIDI data transmitter comprising:
• a free area-checking block for checking an amount of free area of said MIDI data storage block;
• and
• all note-off data output block for transmitting all note-off data for turning all notes off via said transmitter block, when said amount of said free area of said MIDI data storage block checked by said free area-checking block becomes smaller than a predetermined value.

A MIDI data receiver for receiving MIDI data transmitted by a radio signal for transmitting performance information, and delivering said received MIDI data to a MIDI data processor which carries out signal processing based on MIDI data,

• said MIDI data receiver comprising:
• a note number storage block for storing note numbers of notes which are turned on out of said received MIDI data;
• and
• a note-off control block for delivering note-off data corresponding to all note numbers stored in said note number storage block to said MIDI data processor, when all note-off data is received by way of said radio signal.

A MIDI data transmitter/receiver connected to a MIDI instrument for transmitting MIDI data delivered from said MIDI instrument by a radio signal to another MIDI instrument, comprising:

• a transmitter block having a plurality of transmitting channels which can be changed over, including a control channel for transmitting data of a free channel;
• a receiver block having a plurality of receiving channels which can be changed over;
• a free channel-detecting block for changing over one receiving channel of said receiver block to another, and for detecting a free channel out of said plurality of receiving channels, based on reception output from said receiver block at a channel to which said receiver block is changed;
• and
• a transmission control for transmitting data of said free channel detected by said free channel-detecting block and said MIDI data delivered from said MIDI instrument to said transmitter block;
• wherein said transmission control block changes over said transmitting channel of said transmitter block to said control channel, and after delivering said data of said free channel detected by said free channel-detecting block to said transmitter block, changes over said transmitting channel of said transmitter block to a transmitting channel corresponding to said data of said free channel.

A MIDI data transmitter/receiver connected to a MIDI instrument for receiving a radio signal transmitted, and delivering MIDI data based on said received radio signal to said MIDI instrument connected thereto, comprising:

• a receiver block having a plurality of receiving channels which can be changed over, including a control channel for receiving data of a free channel;
• a free channel data-detecting block for detecting said data of said free channel from a signal received by said receiver block;
• and
• a reception control block for changing over said receiving channel of said receiver block;
• wherein said reception control block changes over said receiving channel of said receiver block to said control channel, while said reception control block is on standby, and changes over said receiving channel of said receiver block to a receiving channel corresponding to said data of said free channel when said free channel data-detecting block has detected said data of said free channel.

A MIDI data transmitter/receiver connected to a MIDI instrument for transmitting MIDI data to and receiving MIDI data from another MIDI instrument, comprising:

• a transmitter block having a plurality of transmitting channels which can be changed over, including a control channel for transmitting data of a free channel;
• a receiver block having a plurality of receiving channels which can be changed over, including a control channel for transmitting data of said free channel;
• a transmission/reception changeover block for making operative one of said transmitter block and said receiver block;
• a reception control block for controlling changeover of one of said receiving channels of said receiver block to another of said receiving channels when said receiver block is made operative by said transmission/reception changeover block;
• a free channel-detecting block for changing over said one receiving channel of said receiver block to said another, and detecting a free channel out of said plurality of receiving channels, based on reception output from said receiver block at said another channel to which said receiver block is changed;
• a free channel data-detecting block for detecting said data of said free channel from a signal received by said receiver block;
• and
• a transmission control block for transmitting said data of said free channel detected by said free channel-detecting block and said MIDI data delivered from said MIDI instrument to said transmitter block;
• wherein when said transmission/reception changeover block has made said transmitter block operative, said transmission control block changes over said transmitting channel of said transmitter block to said control channel, and after delivering said data of said free channel detected by said free channel-detecting block to said transmitter block, changes over said transmitting channel of said transmitter to a transmitting channel corresponding to said data of said free channel, as well as delivers said MIDI data to said transmitter block;
• and
• wherein when said transmission/reception changeover block has made said receiver block operative, said reception control block changes over said receiving channel of said receiver block to said control channel, and when said free channel data-detecting block has detected said data of said free channel, changes over said receiving channel of said receiver to a receiving channel corresponding to said data of said free channel.

A MIDI data transmitter for transmitting MIDI data, which is capable of being connected to a plurality of MIDI data output devices for delivering MIDI data for transmission of performance information, comprising:

• a MIDI data input block for inputting MIDI data received from two or more of said plurality of MIDI data devices;
• memory means for storing said MIDI data input by said MIDI data input block together with data of each unit number indicative of each of said MIDI data output block having delivered said MIDI data;
• and
• a transmitter block for transmitting a radio signal modulated by said data of each unit number indicative of each of said MIDI data output block, and said MIDI data stored together with said data of said each unit number.