In fact, almost all the recordings documented chronologically in the book were later issued as such. The photo shows the production of rolls no. 1–6. There are a few corrections and title changes that later appeared differently in the catalog.
Striking are deletions (shown in brackets in the list below) and corrections of pianists’ names, which suggest that pseudonyms were used here to increase the number of pianists listed in the catalog. For example, a J. Hommel recorded pieces – and was then corrected to S. Wilberg. There are similar anomalies with W. Rehberg / S. Wilberg and Hans Förster / S. Wilberg. However, it is also known from the other manufacturers that pseudonyms were used. Further research will be needed here.
It seems to have been possible to record between 18 and 24 pieces in one day. At least, this number is found for many pianists. As can be seen from the comparison of the signature dates on the recording grand piano with the dates in the DUCA book, the pianists were evidently often on site for several days.
The book contains numerous special features. Here are some examples:
On May 15, 1909, Oswald Philipps himself recorded a roll. Another roll with August Philipps, four hands. August Philipps also recorded a few rolls.
On May 19, 1911, Ella Rafelson, the famous assistant of Robert Teichmüller, recorded rolls.
On June 17, 1911, Walter Rehberg, only eleven years old, recorded a roll.
On June 17, 1911, Irene Hendorf, later Paul Hindemith’s piano partner, recorded a roll.
On June 20, 1911, Helene Moillet-Gobat, the first woman in Germany to pass a master’s examination, recorded rolls.
On July 11, 1911, Xaver Scharwenka recorded 22 pieces – more than for any other system.
On October 10, 1911, August Schmid-Lindner recorded 25 pieces in one day (if the entry is correct), the highest number in one day.
On May 17, 1912, Ferruccio Busoni and Michael von Zadora recorded pieces for four hands.
Here is a list of all entries from the DUCA music catalog, in ascending order by date:
Date Pianist (born-died) [total / recorded roll numbers]
10.07.1908 Hans Förster [1 / no 8]
22.07.1908 Hans Förster [3 / no 1-3]
08.08.1908 Hans Förster [1 / no 4]
11.08.1908 Hans Förster [1 / no 11]
24.08.1908 Ellen Pairan [4 / no 5-6; 14-16]
27.08.1908 Ellen Pairan [1 / no 7]
27.08.1908 Willy Rehberg (1863-1937) [5 / no 9-10; 12-13; 20]
30.09.1908 Prof. Alban Förster (1849-1916) [4 / no 22; 24; 28; 29]
04.10.1908 Eugene d’Albert (1864-1932) [7 / no 21; 23; 25; 30-34]
08.10.1908 Willy Rehberg (1863-1937) [3 /; no 18-19; 27]
14.10.1908 Eugene d’Albert (1864-1932) [1 / no 17]
29.11.1908 Anton Förster [7 / no 35-41]
30.11.1908 Anatol von Rössel (1877-1967) [14 / no 42-43; 61-64; 66; 68-74]
01.12.1908 Anatol von Rössel (1877-1967) [19 / no 44-60; 65; 67; 96]
02.12.1908 Norah Drewett (1882-1960) [10 / no 75-84]
09.12.1908 Willy Rehberg (1863-1937) [2 / no 34; 34a]
13.12.1908 Fritjof Backer-Gröndahl (1885-1959) [7 / no 85-91]
24.01.1909 (J. Hommel) S. Wilberg [1 / no 92]
24.01.1909 J. Hommel [1 / no 96]
26.01.1909 Willy Rehberg (1863-1937) [1 / no 95]
27.01.1909 Willy Rehberg (1863-1937) [1 / no 93]
27.01.1909 Mr. and Mrs. Willy and Elsa Rehberg (1863-1937) [1 / no 94]
06.04.1909 Willi M. Jinkertz [14 / no 98-111]
08.05.1909 Prof. Carl Friedberg (1872-1955) [12 / no 112-123]
15.05.1909 Oswald Philipps [1 / no 124]
15.05.1909 Willy Rehberg (1863-1937) [3 / no 125; 127-128]
15.05.1909 August Philipps [2 / no 126; 130]
15.05.1909 August and Oswald Philipps [1 / no 129]
20.05.1909 Professor Julius Röntgen (1855-1932) [3 / no 138-140]
21.05.1909 Professor Julius Röntgen (1855-1932) [7 / no 131-132; 134-136; 137; 141]
22.05.1909 Professor Julius Röntgen (1855-1932) [7 / no 133; 142-147]
20.07.1909 Frederic Lamond (1868-1948) [6 / no 148-150; 156-157]
21.07.1909 Frederic Lamond (1868-1948) [16 / no 151-155; 158-168]
nn Maria Oppenheimer [2 / no 169-170]
04.10.1909 Johann Wysmann [13 / no 171-183]
04.10.1909 Francois de la Croix [11 / no 184-194]
07.10.1909 Adolf Tandler (1875-1953) [5 / no 195-199]
09.10.1909 (J. Hommel) S. Wilberg [5 / no 200-204]
25.10.1909 Hans Förster [4 / no 205-208]
03.12.1909 Hans Förster [8 / no 209-216]
07.12.1909 Hans Förster [7 / no 217-222; 227]
07.12.1909 August Philipps [4 / no 223-226]
13.12.1909 D. Knopf (A. Knoof) [7 / no 240-246]
14.12.1909 (Willy Rehberg) S. Wilberg [12 / no 228-239]
22.12.1909 (Willy Rehberg) S. Wilberg [3 / no 247; 255-256]
22.12.1909 Willy Rehberg (1863-1937) [6 / no 248-253]
22.12.1909 Felix Baer [1 / no 254]
07.01.1910 Raoul Pugno (1852-1914) [24 / no 257-280]
12.01.1910 Hans Förster [4 / no 281-284]
10.02.1910 Hans Förster [3 / no 285-287]
16.02.1910 Prof. Frida Kwast-Hodapp (1880-1949) [20 / no 288-305; 317-318]
16.02.1910 Prof. James Kwast (1852-1927) [8 / no 306-313]
16.02.1910 Prof. and Mrs. Kwast [3 / no 314-316]
nn Hans Förster [3 / no 319-321]
nn Hans Förster and S. Wilberg [4 / no 322-325]
07.05.1910 Willy Rehberg (1863-1937) [2 / no 326-327]
07.05.1910 (Willy Rehberg) Hans Förster [1 / no 328]
23.05.1910 (Willy Rehberg) Hans Förster [6 / no 329-334]
22.07.1910 Hans Förster [5 / no 335-339]
31.07.1910 Willy Rehberg (1863-1937) [1 / no 340]
01.10.1910 B. Schröder [2 / no 341-342]
13.11.1910 Willy Rehberg (1863-1937) [7 / no 343-349]
21.11.1910 August Philipps [1 / no 350]
21.11.1910 S. Wilberg [1 / no 351]
21.11.1910 S. Wilberg and Hans Förster [3 / no 352-354]
25.11.1910 Berthe Marx-Goldschmidt (1859-1925) [18 / no 355-373]
05.12.1910 August Philipps [1 / no 374]
06.12.1910 Ignaz Friedmann (1882-1948) [22 / no 375-396]
08.12.1910 Ugo Afferni (1871-1931) [1 / no 397]
07.01.1911 Norah Drewett (1882-1960) [6 / no 398-403]
13.01.1911 Maria Careras [22 / no 404-425]
18.01.1911 Marc Meytschik (1880-1950) [10 / no 426-435]
25.01.1911 Josef Weiss (1864-1945) [24 / no 436-459]
06.02.1911 Felix Baer [5 / no 460-464]
03.05.1911 Michael von Zadora (1882-1946) [23 / no 465-487]
15.05.1911 Prof. Theodor Müller-Reuter (1858-1919) [14 / no 488-501]
16.05.1911 Alfred Grünfeld (1852-1924) [20 / no 502-521]
19.05.1911 Miss Ella Rafelson [24 / no 522-544]
22.05.1911 Augusta Cottlow (1878-1954) [23 / no 545-567]
01.06.1911 Paula Stebel (1885-1932) [20 / no 568-587]
02.06.1911 Johann Strauß III (1866-1939) [7 / no 588-594]
07.06.1911 Prof. Max von Pauer (1866-1945) [22 / no 595-616]
08.06.1911 Ernst Toch (1887-1964) [7 / no 617-623]
10.06.1911 Fritz von Bose (1865-1945) [20 / no 624-643]
17.06.1911 Walter Rehberg (1900-1957) [1 / no 644]
17.06.1911 Irene Hendorf [1 / no 645]
17.06.1911 Miss Else Kallmeyer [1 / no 646]
17.06.1911 Louise Löhr (1862-1938) [3 / no 647-649]
17.06.1911 Frieda Thury [2 / no 650-651]
20.06.1911 Helene Moillet-Gobat [20 / no 652-671]
22.06.1911 Lonny Epstein (1885-1965) [19 / no 672-691]
24.06.1911 Maria Kaufmann [21 / no 692-712]
26.06.1911 Ida Feinmann [3 / no 713-715]
26.06.1911 Heinz Hanitsch [2 / no 716-717]
27.06.1911 Germaine Arnaud [22 / no 718-739]
29.06.1911 Prof. Moritz Mayer-Mahr (1869-1947) [24 / no 740-763]
05.07.1911 Conrad Ansorge (1862-1930) [20 / no 764-783]
10.07.1911 Ernst Buchhorn [12 / no 5000-5011]
11.07.1911 Xaver Scharwenka (1850-1924) [22 / no 784-805]
21.07.1911 Richard Singer [22 / no 806-827]
27.07.1911 Paul Eggert [21 / no 828-848]
29.07.1911 B. Hinze-Reinhold (1877-1964) [20 / no 849-868]
31.07.1911 Felix Baer [2 / no 869-870]
10.10.1911 August Schmid-Lindner (1870-1959) [25 / no 871-895]
12.10.1911 Willy Rehberg (1863-1937) [3 / no 896-898]
14.10.1911 Arthur Friedheim (1859-1932) [22 / no 899-920]
30.10.1911 Adolf Schmitt [10 / no 921-930]
31.10.1911 Hans Förster [1 / no 5012]
03.11.1911 Dr. Otto Neitzel (1852-1920) [18 / no 931-948]
07.11.1911 Edmund Parlow (1855-1944) [10 / no 949-958]
15.11.1911 Hans Förster [1 / no 969]
16.11.1911 Alfred Cortot (1877-1962) [10 / no 959-968]
20.11.1911 Elfriede Vogel [1 / no 970]
20.11.1911 Hans Förster [1 / no 971]
24.11.1911 Germaine Schnitzer (1888-1982) [21 / no 972-992]
25.11.1911 Wynne Pyle (1881-1980) [20 / no 993-1013]
05.12.1911 Alice Ripper (1889-1961) [11 / no 1014-1018; 1020-1025]
11.12.1911 Lucien Wurmser (1877-1967) [21 / no 1026-1046]
14.12.1911 Eduard Risler (1873-1929) [22 / no 1047-1068]
18.12.1911 Willy Rehberg (1863-1937) [1 /no 1110]
13.01.1912 Arthur Schnabel (1882-1951) [19 / no 1069-1087]
16.01.1912 Wera Schapira (1891-1930) [22 / no 1088-1109]
26.01.1912 Ernst Buchhorn [10 / no 5013-5022]
27.01.1912 Hans Förster [1 / no 1111]
30.01.1912 Ernst Buchhorn [10 / no 5023-5032]
05.02.1912 Willy Rehberg (1863-1937) [1 / no 1112]
05.02.1912 Hans Förster and Mrs. Treis [3 / no 1113-1115]
05.02.1912 Hans Förster [1 / no 1116]
14.02.1912 Erich Wolfgang Korngold (1897-1957) [7 / no 1117-1123]
15.02.1912 Arthur Schnabel (1882-1951) [3 / no 1124-1126]
08.03.1912 Hans Förster [1 / no 1127]
18.03.1912 Felix Baer [4 / no 1128-1131]
13.04.1912 Alexander Pohl [1 / no 1136]
16.04.1912 Hans Förster [1 / no 1019]
16.04.1912 Hans Förster [1 / no 1132]
22.04.1912 Felix Baer [1 / no 1133]
07.05.1912 Hans Förster [2 / no 1134-1135]
17.05.1912 Prof. Ferruccio Busoni (1866-1924) [16 / no 1137-1152]
17.05.1912 Prof. Ferruccio Busoni (1866-1924)
and Michael von Zadora (1882-1946) [8 / no 1153-1160]
20.05.1912 Hans Förster [1 / no 1161]
10.06.1912 Hans Pfitzner (1869-1949) [20 / no 1162-1181]
19.06.1912 Camille Saint-Saens (1835-1921) [8 / no 1182-1189]
24.06.1912 Felix Baer [4 / no 1190-1193]
31.07.1912 Hans Förster [1 / no 1194]
27.08.1912 Hans Förster [1 / no 1195]
25.09.1912 Hans Förster [2 / no 1196-1197]
17.10.1912 Hans Förster [1 / no 1198]
25.11.1912 Willy Rehberg (1863-1937) [1 / no 1199]
13.12.1912 Josef Treis [1 / no 1200]