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cannot record subset of channels in Biosemi.exe (windows)
Hello,
I'm trying to use the Biosemi app on our lab 64 channels Active2 biosemi system.
I'm using the Windows 1.10b build which I've downloaded from ftp://sccn.ucsd.edu/pub/software/LSL/
I can link to the Biosemi perfectly fine, but when I try to resolve the stream on another machine, I get 353 channels, corresponding to 4 amp boxes (each 64eeg+8ext+16aux) + 1 trigger channel, even though I've selected only a subset of 64 channels in the app.
And I've also taken care to select a subset of channels before linking.
Is there anything obvious that I've missed?
Hmmm, I've never had this problem before. The BioSemi app has been unchanged for quite sometime and it has been used extensively at SCCN (and other labs) in all different kinds of configurations over the years. Unfortunately, I do not have a device to test this problem. Maybe Clement can offer some insight?
On 12/13/2017 12:50 PM, Nicolas Barascud wrote:
Hello,
I'm trying to use the Biosemi app on our lab 64 channels Active2 bio semi system.
I'm using the Windows 1.10b build which I've downloaded from ftp://sccn.ucsd.edu/pub/software/LSL/
I can link to the Biosemi perfectly fine, but when I try to resolve the stream on another machine, I get |353| channels, corresponding to 4 amp boxes (each 64eeg+8ext+16aux) + 1 trigger channel, even though I've selected only a subset of 64 channels in the app.
And I've also taken care to select a subset of channels /before/ linking.
Is there anything obvious that I've missed?
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Ah, some progress : actually the channel selection does something indeed.
For instance if I select only 32 channels, it does put 32 channels in the stream
BUT multiplied by 4.
Eg, if I select 32 channels, here is the list of channels that I can resolve from the network (total of 225 = [32eeg+ 16aux + 10ext] * 4 boxes):
[0]: 'Trig1'
[1]: 'A1_Box1'
[2]: 'A2_Box1'
[3]: 'A3_Box1'
[4]: 'A4_Box1'
[5]: 'A5_Box1'
[6]: 'A6_Box1'
[7]: 'A7_Box1'
[8]: 'A8_Box1'
[9]: 'A9_Box1'
[10]: 'A10_Box1'
[11]: 'A11_Box1'
[12]: 'A12_Box1'
[13]: 'A13_Box1'
[14]: 'A14_Box1'
[15]: 'A15_Box1'
[16]: 'A16_Box1'
[17]: 'A17_Box1'
[18]: 'A18_Box1'
[19]: 'A19_Box1'
[20]: 'A20_Box1'
[21]: 'A21_Box1'
[22]: 'A22_Box1'
[23]: 'A23_Box1'
[24]: 'A24_Box1'
[25]: 'A25_Box1'
[26]: 'A26_Box1'
[27]: 'A27_Box1'
[28]: 'A28_Box1'
[29]: 'A29_Box1'
[30]: 'A30_Box1'
[31]: 'A31_Box1'
[32]: 'A32_Box1'
[33]: 'EX1_Box1'
[34]: 'EX2_Box1'
[35]: 'EX3_Box1'
[36]: 'EX4_Box1'
[37]: 'EX5_Box1'
[38]: 'EX6_Box1'
[39]: 'EX7_Box1'
[40]: 'EX8_Box1'
[41]: 'AUX1_Box1'
[42]: 'AUX2_Box1'
[43]: 'AUX3_Box1'
[44]: 'AUX4_Box1'
[45]: 'AUX5_Box1'
[46]: 'AUX6_Box1'
[47]: 'AUX7_Box1'
[48]: 'AUX8_Box1'
[49]: 'AUX9_Box1'
[50]: 'AUX10_Box1'
[51]: 'AUX11_Box1'
[52]: 'AUX12_Box1'
[53]: 'AUX13_Box1'
[54]: 'AUX14_Box1'
[55]: 'AUX15_Box1'
[56]: 'AUX16_Box1'
[57]: 'A1_Box2'
[58]: 'A2_Box2'
[59]: 'A3_Box2'
[60]: 'A4_Box2'
[61]: 'A5_Box2'
[62]: 'A6_Box2'
[63]: 'A7_Box2'
[64]: 'A8_Box2'
[65]: 'A9_Box2'
[66]: 'A10_Box2'
[67]: 'A11_Box2'
[68]: 'A12_Box2'
[69]: 'A13_Box2'
[70]: 'A14_Box2'
[71]: 'A15_Box2'
[72]: 'A16_Box2'
[73]: 'A17_Box2'
[74]: 'A18_Box2'
[75]: 'A19_Box2'
[76]: 'A20_Box2'
[77]: 'A21_Box2'
[78]: 'A22_Box2'
[79]: 'A23_Box2'
[80]: 'A24_Box2'
[81]: 'A25_Box2'
[82]: 'A26_Box2'
[83]: 'A27_Box2'
[84]: 'A28_Box2'
[85]: 'A29_Box2'
[86]: 'A30_Box2'
[87]: 'A31_Box2'
[88]: 'A32_Box2'
[89]: 'EX1_Box2'
[90]: 'EX2_Box2'
[91]: 'EX3_Box2'
[92]: 'EX4_Box2'
[93]: 'EX5_Box2'
[94]: 'EX6_Box2'
[95]: 'EX7_Box2'
[96]: 'EX8_Box2'
[97]: 'AUX1_Box2'
[98]: 'AUX2_Box2'
[99]: 'AUX3_Box2'
[100]: 'AUX4_Box2'
[101]: 'AUX5_Box2'
[102]: 'AUX6_Box2'
[103]: 'AUX7_Box2'
[104]: 'AUX8_Box2'
[105]: 'AUX9_Box2'
[106]: 'AUX10_Box2'
[107]: 'AUX11_Box2'
[108]: 'AUX12_Box2'
[109]: 'AUX13_Box2'
[110]: 'AUX14_Box2'
[111]: 'AUX15_Box2'
[112]: 'AUX16_Box2'
[113]: 'A1_Box3'
[114]: 'A2_Box3'
[115]: 'A3_Box3'
[116]: 'A4_Box3'
[117]: 'A5_Box3'
[118]: 'A6_Box3'
[119]: 'A7_Box3'
[120]: 'A8_Box3'
[121]: 'A9_Box3'
[122]: 'A10_Box3'
[123]: 'A11_Box3'
[124]: 'A12_Box3'
[125]: 'A13_Box3'
[126]: 'A14_Box3'
[127]: 'A15_Box3'
[128]: 'A16_Box3'
[129]: 'A17_Box3'
[130]: 'A18_Box3'
[131]: 'A19_Box3'
[132]: 'A20_Box3'
[133]: 'A21_Box3'
[134]: 'A22_Box3'
[135]: 'A23_Box3'
[136]: 'A24_Box3'
[137]: 'A25_Box3'
[138]: 'A26_Box3'
[139]: 'A27_Box3'
[140]: 'A28_Box3'
[141]: 'A29_Box3'
[142]: 'A30_Box3'
[143]: 'A31_Box3'
[144]: 'A32_Box3'
[145]: 'EX1_Box3'
[146]: 'EX2_Box3'
[147]: 'EX3_Box3'
[148]: 'EX4_Box3'
[149]: 'EX5_Box3'
[150]: 'EX6_Box3'
[151]: 'EX7_Box3'
[152]: 'EX8_Box3'
[153]: 'AUX1_Box3'
[154]: 'AUX2_Box3'
[155]: 'AUX3_Box3'
[156]: 'AUX4_Box3'
[157]: 'AUX5_Box3'
[158]: 'AUX6_Box3'
[159]: 'AUX7_Box3'
[160]: 'AUX8_Box3'
[161]: 'AUX9_Box3'
[162]: 'AUX10_Box3'
[163]: 'AUX11_Box3'
[164]: 'AUX12_Box3'
[165]: 'AUX13_Box3'
[166]: 'AUX14_Box3'
[167]: 'AUX15_Box3'
[168]: 'AUX16_Box3'
[169]: 'A1_Box4'
[170]: 'A2_Box4'
[171]: 'A3_Box4'
[172]: 'A4_Box4'
[173]: 'A5_Box4'
[174]: 'A6_Box4'
[175]: 'A7_Box4'
[176]: 'A8_Box4'
[177]: 'A9_Box4'
[178]: 'A10_Box4'
[179]: 'A11_Box4'
[180]: 'A12_Box4'
[181]: 'A13_Box4'
[182]: 'A14_Box4'
[183]: 'A15_Box4'
[184]: 'A16_Box4'
[185]: 'A17_Box4'
[186]: 'A18_Box4'
[187]: 'A19_Box4'
[188]: 'A20_Box4'
[189]: 'A21_Box4'
[190]: 'A22_Box4'
[191]: 'A23_Box4'
[192]: 'A24_Box4'
[193]: 'A25_Box4'
[194]: 'A26_Box4'
[195]: 'A27_Box4'
[196]: 'A28_Box4'
[197]: 'A29_Box4'
[198]: 'A30_Box4'
[199]: 'A31_Box4'
[200]: 'A32_Box4'
[201]: 'EX1_Box4'
[202]: 'EX2_Box4'
[203]: 'EX3_Box4'
[204]: 'EX4_Box4'
[205]: 'EX5_Box4'
[206]: 'EX6_Box4'
[207]: 'EX7_Box4'
[208]: 'EX8_Box4'
[209]: 'AUX1_Box4'
[210]: 'AUX2_Box4'
[211]: 'AUX3_Box4'
[212]: 'AUX4_Box4'
[213]: 'AUX5_Box4'
[214]: 'AUX6_Box4'
[215]: 'AUX7_Box4'
[216]: 'AUX8_Box4'
[217]: 'AUX9_Box4'
[218]: 'AUX10_Box4'
[219]: 'AUX11_Box4'
[220]: 'AUX12_Box4'
[221]: 'AUX13_Box4'
[222]: 'AUX14_Box4'
[223]: 'AUX15_Box4'
[224]: 'AUX16_Box4'
Hopefully you've solved this, but it sounds like your amp is on speedmode 0 - 3 (configured for daisy-chain setup). See https://www.biosemi.com/faq/adjust_samplerate.htm
