iWoofer = 开放硬件和免费应用程序，用于低音炮的DSP控制

iWoofer

samjazz, one of the most impressive features of iWoofer is the inexpensive ADAU1761 chip and <3Hz resolution minimal phase FIR implemented on it with 2.5mS latency(plus 2.5mS for IIR filtering so total is 5mS). The secret weapon is the multirate FIR what we've implemented in assembly language for ADAU1761. Finally, we got better result than Dirac room correction(funny, they very proud for 15mS latency!) for 1/10 money for hardware ;) About the Baidu disk, my wife said it is too complicated and I put our data to the russian cloud https://yadi.sk/d/cjkMB8Hz3KUncy I've tested that link, no problem at all. And yes, we are located near to Shenzhen.
是iWoofer最令人印象深刻的特性之一，它是价格低廉的ADAU1761芯片，在其上实现的<3Hz分辨率最小相位FIR，具有2.5mS的延迟（加上2.5mS的IIR滤波，总共为5mS）。 秘密武器是我们用ADAU1761的汇编语言实现的多速率FIR。 最后，我们得到比Dirac更好的效果（有趣的是，他们非常自豪的为15mS的延迟！）硬件为1/10钱）关于百度盘，我的妻子说这太复杂了，我把我们的数据到俄罗斯 云https://yadi.sk/d/cjkMB8Hz3KUncy我测试了这个链接，没有任何问题。 是的，我们位于深圳附近。

qxzyxdiy

nice ，Android应用开发出来了没？LZ

iWoofer

Regarding Android version. We have that but not published yet, I'll ask if I can publish apk at that forum this evening. Stay updated. The android version has no room correction functionality because too many android cellphones and we've no idea about their microphone frequency response.
关于Android版本。 我们有，但尚未发布，我会问，如果我可以在今天晚上在该论坛上发布apk。 保持更新。 Android版本没有房间更正功能，因为太多的android手机，我们不知道他们的麦克风频率响应。

iWoofer

Thank you guys for a warm greeting, and by the way, happy CNY! Actually, I hate this Holliday, too noisy for me but my 50/50% russian/chinese kids like it ;)
谢谢大家的热烈欢迎，顺便快乐！ 其实，我讨厌这个霍利迪，对我来说太吵了，但是我的50/50％的俄罗斯/中国孩子喜欢这个

DSC_2533.jpg

iWoofer

Oh, I forgot to say about the antenna. V4.01 iWoofer contains the best antenna but a bit too big(Ti recommended #1). V4.02 antenna smaller but connection range less about 15%(in my apartment about 10m, where 2.5GHz is very busy and over 50 WIFI's is detected simultaneously).
哦，我忘了说天线。 V4.01 iWoofer包含最好的天线，但有点太大（钛建议＃1）。 V4.02天线较小，但连接范围小于15％（在我的公寓约10米）。

iWoofer

iWoofer for Android and latest ROM for cc2540 https://yadi.sk/d/LByaEb_y3SDLbV

jacksl528

the lovely boy in your picture is like a chinese child。
in our country, we have been busy for the new year。。。preparing for the banquet。


at the same time, give you this wonderful blessing

samjazz

iWoofer 发表于 2018-2-8 10:34
swing, if I understand correctly your text, you asking for a full range (20-20000Hz) audio control s ...

个人觉得没有room correction没问题，也不必考虑过多关于声音，只要你说的THD、S / N等都是好的就可以，先使用起来再说。当然如果与你的订单有冲突，我们也是可以理解的。

samjazz

iWoofer 发表于 2018-2-8 11:23
Regarding Android version. We have that but not published yet, I'll ask if I can publish apk at that ...

谢谢的apk，发现好像phase有误？单位是“Hz”？

samjazz

iWoofer 发表于 2018-2-8 15:23
Oh, I forgot to say about the antenna. V4.01 iWoofer contains the best antenna but a bit too big(Ti  ...

谢谢你的回复，V4.01的那款天线我未使用过，有机会试一下。V4.02的那款也有10m？是蓝牙接收差出名的apple手机吗？
可爱的混血儿，我已经没机会了，只能期待我儿子

347776338

不错，最好能支持二分频

iWoofer

The slider "Phase" is an allpass 1st order filter, so to avoid any lie about "0-180 degree", which very common in consumer electronics, I prefer to call that as is.
“相位”滑块是全通一阶滤波器，所以为了避免在消费类电子产品中常见的“0-180度”的任何谎言，我更愿意这样称呼。

iWoofer

As I said, my apartment has very busy EMI environment in 2.5GHz range, over 50 WIFI of my neighbors. 4.02 antenna shows stable work at 10m, 4.01 12-15m but also depends on, because in that apartment I've no 15m direct view and have to go porch for the test. So this is not laboratory precise result but rather my feeling: 4.01 is better for 15-20%.
正如我所说，我的公寓在2.5GHz范围内拥有非常繁忙的EMI环境，超过50个邻居的WIFI。 4.02天线在10米，4.01 12-15米处显示稳定的工作，但也取决于，因为在那个公寓我没有15米的直接看法，必须走廊测试。 所以这不是实验室精确的结果，而是我的感觉：4.01比15-20％更好。

samjazz

iWoofer 发表于 2018-2-9 10:07
The slider "Phase" is an allpass 1st order filter, so to avoid any lie about "0-180 degree", which v ...

确实是这样，不同的频率就有不同的相位，就要看使用者是否容易理解了。
虽然硬件不是问题，也下载了你的文件，但是可能也很难自己做这个板来玩，因为我应该没有AD的开发工具，估计论坛里的大部分发烧友也是这种情况。
另外很多超低音成品都有“HP output”，实际上就是2分频了，这个1761的8路输出是否有些浪费？

iWoofer

yep, this is the frequency where phase changes, hence, user need set frequency near to X-over point ( between the subwoofer and full-range speakers, that usually around 80Hz), and listen the result. In case of 0-180 degree user have no idea how many degrees it should be at all. So "0-180" it is just stupid legacy like a 99% things in audio at all..
这是相位变化的频率，因此用户需要设置X-over点附近（低音炮和全频扬声器之间，通常在80Hz左右）的频率，然后听取结果。 在0-180度的情况下用户不知道应该有多少度。 所以“0-180”只是一个99％的东西在音频愚蠢的遗产..
PS:  By the way, I used the same antenna (4.01) with the CSR64215 chip, and customer reported about >25m range in their office, which actually had max dimension 25m. On the other hand, I've tried cc2540 modules from taobao. They used very similar to iWoofer 4.02 antenna but scaled down for a 20%. The result was very poor, about 6m range. By the way, I see no this taobao shop still alive. It's should be a lesson for others who believe he could stupidly scale 2.4GHz antenna without any problem.
顺便说一下，我使用了与CSR64215芯片相同的天线（4.01），客户在他们的办公室报告的距离大于25米，实际最大尺寸为25米。 另一方面，我尝试了淘宝上的cc2540模块。 他们使用非常相似的iWoofer 4.02天线，但缩小了20％。 结果非常差，大约6米范围内。 顺便说一下，我看不到这个淘宝店还活着。 对其他人来说，这应该是一个教训，他相信他可以毫无问题地愚弄2.4GHz的天线。

samjazz

iWoofer 发表于 2018-2-9 11:08
yep, this is the frequency where phase changes, hence, user need set frequency near to X-over point  ...

我自己的蓝牙距离测试经验是：要同一台手机（起码同一型号）在同一环境下测量才可以比较准确，手机品牌不同，差异非常大，苹果是倒数第一。
PS：楼主有用TI的版本吗？我有TI的工具

iWoofer

Regarding Analog Devices tools, sorry, I don't understand google translation of your question yet..
Regarding "HP output", you know, no one asked for that ever. Usually companies, who call me to talk about the iWoofer asking only for renaming the "iWoofer" name to their company/brand name, and delete all iWoofer data from the public domain. They offer money for that, quite small money actually. Two chinese company asked to change X-over GUI because they don't understand how it works, it was really ridiculous. They want control parametric EQ with 3 sliders F/Q/Gain like SVS ugly application
关于ADI公司的工具，对不起，我不明白你的问题谷歌翻译呢..
关于“惠普产量”，你知道，没有人问过。 通常这些公司会打电话给我，谈论iWoofer只要求将“iWoofer”的名称重命名为其公司/品牌名称，并从公有领域删除所有iWoofer数据。 他们为此提供资金，实际上是相当小的钱。 两家中国公司要求改变X-over GUI，因为他们不明白它是如何工作的，这真是荒谬。 他们希望控制参数均衡与3滑块F / Q /增益像SVS丑陋的应用程序



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iWoofer

Actually SVS IOS app is a good example how stupid audio industry today. That app works with SVS subwoofers for 14000RMB cost but SVS didn't even made Laplace transform to drawing adequate frequency response for the EQ transfer function. In my opinion their EQ curve doesn't look like real one at all. For such money you buy just 3 ugly looking EQ, LPF and gain control slider, ooh hell!
其实SVS的IOS应用程序是一个很好的例子，如今愚蠢的音频行业。 该应用程序与SVS低音炮一起工作，成本为14000元，但SVS甚至没有使拉普拉斯变换为EQ传递函数绘制足够的频率响应。 在我看来，他们的EQ曲线看起来并不像真正的曲线。 对于这样的钱，你买只有3丑看EQ，LPF和增益控制滑块，哦，地狱！

iWoofer

just want to remind the iWoofer X-over interface in action   https://yadi.sk/d/VH88LsPM3KfWse

swing

iWoofer 发表于 2018-2-8 10:34
swing, if I understand correctly your text, you asking for a full range (20-20000Hz) audio control s ...

Don't care about the audiophile...cause they never use subwoofer.
I mean in the professional sound systems, like KV2 active speaker:

https://www.kv2audio.com/technology.html#ElectronicIntegrity
https://www.kv2audio.com/technology.html#SoundSystemDesign