Tag Archives: MB

Use of Instrument browser

4fm   May 11, 2017  

In this part of tutorial we shall demonstrate work of the grid with large data volumes on the example of Instrument


The business model already contains Instrument class. We shall add only one field (quoting currency) and create a lot of instruments in the application (e.g. 100000). For this purpose we shall modify Provider class and create an arbitrary list of instruments. As before, this list will be available as follows. Now let’s bind the grid to the data source. Memory consumption is one of the most important aspects of displaying large data volumes. When grid connects directly to application business logic, it significantly reduces memory consumption because there are no intermediate objects between the data layer and its presentation.

Let’s create InstrumentBrowser control and place it at the main panel. We shall add a panel for instrument filtering and

searching and the grid to this control. We shall configure grid in the designer and link it to the data source.The screenshot below demonstrates the results of application work.

Let’s note an important detail. The collection of instruments contains about 100,000 elements. It is created when the application is launched. Total memory consumption of the entire application is about 45 MB. This collection is bound to the grid when Instrument browser tab is opened. After that, memory consumption increases to 59 MB. This means that the grid uses about 14 MB to display 100,000 elements. This amount of elements loads for about seconds.These indicators demonstrate of grid performance with realistic numbers of instruments.

To navigate large data volumes a high performance filter is required. The grid provides a simple API for filter implementation. In this application many instruments have Weight, Shares, Capitalization values equaling 0. For more convenient data interpretation it is better not to display insignificant zeroes. Besides, it is better to add thousand separators for data formatting. Use of formats is the simplest way to implement this functionality. An example of creating a simple format for displaying digital information is provided below.

Net Grid provides broad functionality of displaying various datagrid elements, such as cells, rows, headers and columns. The main objective of Dapfor is to develop high-performance software, specifically grids. Popular MVVM programming model that extensively uses databinding, data gridview to separate data from presentation.

Akai MPC Sounds Popular Series of Electronic Musical Instruments

4fm   September 28, 2016  

Akai MPC sounds are gaining a lot of popularity nowadays. These are the very popular and well respected series of electronic musical instruments. Akai MPC sounds was produced by a company of Japan called Akai since 1988. Akai MPC sounds are basically intended for the functioning as drum machine, which is very powerful. Akai MPC sounds are made from the design ideas from the machines like the sequential circuits inc. Linn’s own Linn 9000 and studio 440. It combines a very powerful MIDI sequencer having the ability to sample the sounds of one’s own.

The samples that are latest in the Akai MPC sounds are having powerful features like sampling, interfacing, storage, and the facilities of sound manipulation. These features are helpful in broadening the use of instrument that are beyond just rhythm tracks and drum. There are different models of Akai MPC sounds, which are MPC 60, MPC 3000, MPC 2000, MPC 2000XL, MPC 4000, MPC 2500, MPC 1000 samples, and many more.

The above mentioned models are arranged as per their release dates. MPC 60 is actually a 16 voice polyphonic. This model is very much similar to Linn 9000. MPC 60 was released in 1988. With a 750 KB memory standard, which is expandable to 1.5 MB, this model was the first one of Akai Company. This model is popular for its swing setting and the sequencer is very much powerful as well as flexible. MPC 3000 was the improved version of MPC 60 with the addition of stereo sampling of 16-bit 44.1 kHz. It also had increased memory with 32 voice polyphony and other effects and filters. It was released in 1994.

Then, MPC 2000 was introduced in 1997. It is a 64-track sampler/sequencer. But, this model was discontinued in 2000. This model had a memory of 2 MB and expandable to 32 MB with a sampling of 44.1 kHz. MPC 2000XL was similar to the MPC 2000. It has many new features that include 4 pad bank keys. MPC 4000 was released in 2002. This model was the top of the range flagship product of Akai. It has 16 velocity and pads that are pressure sensitive. Then MPC 2500 was introduced, which is the mid range of Akai MPC sounds with a USB port.

MPC 1000 samples have special features 32 voice stereo sampling with 64-track sequencing. MPC 1000 samples also have pressure sensitive MPC pads.

Author Bio: The author is an expert in the field of Akai MPC sounds. He is also very knowledgeable about MPC 1000 samples. For more information, visit