Part 3. Technology X-RAM As you remember, in senior models X-Fi, Fata1ity and Elite Pro, there are nabortnaya memory X-RAM, volume Mb. It is used not for MIDI-semplov, and for storage or ke`shirovaniya sounds during work of game appendices. It is not known, during what moment in Creative it has been decided to put on a sound card memory, but it has been made strange enough: X-RAM is only on two senior models. On younger Mb a cache under needs DSP are established only. Users have natural questions: whether Gives X-RAM real advantage in games? What to prefer at a choice from two similar cards with a small difference in price Platinum or Fatal1ty? Preconditions of occurrence nabortnoy memories on sound cards are those. Long time there was a problem with deficiency notebooks under 500 of operative memory under a sound so developers or reduced word length semplov that worsened quality, or compressed in formats with losses, MP or OGG, that conducted to loading the processor at unpacking at a stage of playing of a sample. Later, with trends of progress, the situation with system memory became not so is critical, but by some inertia developers went on the blazed way. So, the newest DOOM contained an alternative program sound cursor with grandiose plans to win all the existing cursors, realized hardly probable on the tenth part, with semplami not the highest quality, compressed in format OGG, and unpacked hurriedly in PCM for mix and reproduction. Creative the situation when the world best seller used that that the newest notebooks under 500 expansions EAX, but also even hardware DirectSound did not arrange, that would allow to apply qualitative algorithms 3D a sound. Moreover, any difference between the integrated sound and the newest cards Creative was not neither as, nor in productivity. On struggle against this omission the best forces have been thrown. Including Karlo Vogel'sang, the person developed a sound cursor in UT2003/UT2004. It was interesting to listen to lecture Karlo on KRI20 c heart-breaking intimate details about modernization of sound cursor DOOM3. So, inside softovy'y the cursor operated with 2 channels, with ten processes realtime-dekodirovaniya OGG in memory, and with algorithm of casual displacement of channels on time notebooks under 500 to not admit overflow of a digit grid of the buffer. With greater work, by full copying a sound code, it was possible to introduce support DirectSound + all existing features EAX4. Thus Creative it was necessary to shovel all OpenAL, having let out the special new version and to copy the driver of all sound cards, also only under one game DOOM3. After such terrible details dispatch EAX4/ SDK and appeals Creative to developers of games to introduce OpenAL in the games, apparently, contain a fair share of irony and can be treated precisely and to you so is weak? KRI2005: for notebooks under 500 elites speki X-Fi are known long before the announcement But the purpose has justified means. Game with a patch 1. has increased productivity in FPS up to + %, and the three-dimensional sound has cardinally improved, having received, including really working main feature EAX � Multi-Environment. OpenAL SDK and X-RAM SDK for developers have appeared rather recently, under NDA. At presence X-RAM by default the driver always use nabortnuyu memory if only in the program the return compulsorily is not told. The interdiction of use X-RAM can be useful for buffers with often varying information or too big size. Thus, by default semply' notebooks under 500 ke`shiruyutsya in X-RAM. For full management of all stipulated modes and functions it is necessary for programmer to use OpenAL API. For extraction of the maximal advantage it is necessary to unpack semply' from formats OGG, MP in nabortnuyu memory X-RAM at a stage of preliminary loading of a level of game. But even old appendices can receive benefit from X-RAM as semply' will be ke`shirovat'sya. From new games, on 1 % supporting X-Fi c EAX5/X-RAM, it is necessary to pay attention on Quake4. Game does not demand any patches as is based on DOOM 1.3. We also have asked Creative to give to us copy UT20 notorious X-Fi Edition. The patch should leave for broad masses on official channels, but for some reason does not leave in any way. As externally game nothing differed from usual propatchennoy, it was necessary to find out notebooks under 500 long how to learn, that for the version to us have sent also what parameters vklyuchayut/otklyuchayut spec.podderjku. Later month from Staffs has come the answer what to change the quantity of voices in .ini a file is possible: The parameter is called Channels=XX, other parameter MaxAudioVoices=XX concerns to ISACT. It is possible to take advantage also of a command ' STAT AUDIO ' in console UT2K to see a current mode. UT20 X-Fi Edition by tradition with honour bears a banner with an inscription a splinter in zadnice Creative. Therefore right after exposures we have continued to be engaged in favourite business. Having waited output X-RAM SDK, we have operatively let out the notebooks under 500 new version of our test. The department of support of developers Creative has kindly helped us to understand some not clear moments, and the test, later a little beta-versiy, at last, has been let out. Updatings have concerned the test of loading CPU. It is added: definition of presence and calculation of quantity nabortnoy memories X-RAM; Mode X-RAM ON is fixed in XML-fayle result and looked through then in module DataAnalyzer. At testing we have collided with serious difficulties in vain attempts of revealing of advantage from application X-RAM in synthetics. Even at the most careful testing and vy'chisch'enii all bottlenecks of a code on productivity, the prize has made the tenth shares of percent. It notebooks under 500 would Seem � in real games the prize is, and in synthetics � is not present. We have addressed for explanations in Creative and even were ready to send a code for inspection. In Creative have apprehended this news easy and at all did not begin to challenge, that in synthetics X-RAM will give a prize. From explanations Creative it turned out what to compare we owe advantages from X-RAM at preliminary unpacking OGG in comparison with decoding in real time. We, certainly, shall let out such version in the near future, but already senseless such proof now seems � in games really notebooks under 500 already there is a big gain from such use X-RAM. Another is interestingly: why then it is impossible to use system memory under storage semplov? And what sense in purchase of more dear sound cards with nabortnoy memory for gamers? The sense now is, but there is a sensation that it is supported is a little bit artificial: in case of presence X-RAM unpacking goes in advance, and in case of absence X-RAM semply' will for some reason be decoded in real time under aegis of economy of system memory, without any check of its quantity in the working machine. It is possible to assume why � in development of sound cursors of such games accepted participations employees Creative, and the companies are favourable for creating artificial gandikap for the cards. In the meantime, we have continued the researches � suddenly from X-RAM there will be a notebooks under 500 prize and in synthetics? We tried different variants and modes of testing, improved reliability of a sound cursor. The last, that has been made is an emulation of loading of system memory during the test a problem poorly loading the processor � transfer of great volumes of integer data to different sites of in advance reserved memory. In version 2. of package RightMark updated on February, 1st, 20 3DSound two new functions have been added: " Load system memory " with adjustment of quantity of memory and the size of a piece of data in percentage and an option " Sample size " changes of the size sempla for the control of the general size of memory under notebooks under 500 semply'. Testing has shown, that change of quantity of buffers, the size and inclusion of loading of memory for emulation of loading on the trunk processor-pamyat' do not reveal appreciable advantages of application X-RAM. On processor P of 3. GHz reduction of loading CPU from inclusion X-RAM makes 0, %. Whereas change of quantity of buffers adequately in times changes loading the processor. Owners X-Fi c X-RAM at desire can repeat our experiment. I shall remind, it is necessary to translate X-Fi in Game Mode and to choose in the test device X-Fi in list OpenAL of devices of system. On results of research we can try to answer clauses put in the notebooks under 500 beginning questions: whether Gives X-RAM real advantage in games? Gives, but authentically about it it is known only about new games with participation of programmers Creative during development. While it is not enough such games, but they rather hit: DOOM 1.3, DOOM3:ROE, Quake4, BattleField 2, BattleField 2:SF. Considering that EAX5/X-RAM SDK send recently, there is an occasion for optimism � probably, games becomes fast more. But as OpenAL too slowly gets accustomed among developers because of strong distinctions with DirectSound, it is possible to draw a conclusion, that the situation here sharply will not change. What to prefer at notebooks under 500 a choice from two similar cards with a small difference in price Platinum or Fatal1ty? Fatal1ty those to whom the small gain of productivity in the games listed above and comprehension of is important will choose that the card completely opens the potential. For pragmatists will approach Platinum.) is better aka very malicious editor Other discussions in conference: Comments? Amendments? Additions?

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